TechnicalReference_Dets

MICROSAR DET
Technical Reference

Version 2.4.0

Authors
Hartmut Hörner
Version:
2.4.0
Status:
Released

Technical Reference MICROSAR DET

1  Document Information
1.1
History
Author
Date
Version
Remarks
Hartmut Hörner
2007-11-29
1.0
Initial version
Hartmut Hörner
2008-01-03
1.1
Update to AUTOSAR 3
Hartmut Hörner
2008-04-14
1.2
Naming changed to
AUTOSAR short name,
screen shots updated.
(ESCAN00025687)
Hartmut Hörner
2008-09-16
1.3
Added DET extension
mechanism based on callout
(4.7, 6.3.1).
Added chapter 5.3.
Hartmut Hörner
2010-01-13
2.0
Update to AUTOSAR 4
Hartmut Hörner
2012-04-20
2.1
Added usage hints related to
silent BSW concept in 5.4
(ESCAN00058419)
Hartmut Hörner
2013-04-09
2.2
Added Configurator 5 and
service port interface
(ESCAN00066511)
Hartmut Hörner
2013-09-13
2.3
Added DLT forwarding
support for Configurator 5
(ESCAN00068394,
ESCAN00069807)
Hartmut Hörner
2014-12-10
2.3.1
Added description of
BCD-coded return value of
Det_GetVersionInfo()
(ESCAN00079310)
Hartmut Hörner
2015-06-12
2.4.0
File name changed
(ESCAN00081049)
Added chapter 5.4.
Table 1-1   History of the Document
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Technical Reference MICROSAR DET

1.2
Reference Documents
Index
Document
[1]
AUTOSAR_SWS_DET.pdf, Version 2.2.0
[2]
AUTOSAR_SWS_DET.pdf, Version 3.0.0

Table 1-2 Referenced documents

Please note
We have configured the programs in accordance with your specifications in the

questionnaire. Whereas the programs do support other configurations than the one
specified in your questionnaire, Vector´s release of the programs delivered to your
company is expressly restricted to the configuration you have specified in the
questionnaire.
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2  Component History
Component
New Features
Version
0.01.00
Creation
2.00.00
Update for AUTOSAR Release 2.0
3.00.00
Update for AUTOSAR Release 2.1
3.01.00
GetVersionInfo API added
3.02.00
Extended debug features added
4.00.00
Update for AUTOSAR Release 3
compiler abstraction and memmap added
4.01.00
DET entry callout
5.00.00
Update for AUTOSAR Release 4
6.00.00
Support of Configurator 5 (MSR3)
7.00.00
Support of Configurator 5 (MSR4)
8.00.00
DLT and service port interface
9.00.00
safeBSW
Table 2-1   Component History

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Technical Reference MICROSAR DET

3  Introduction
This  document  describes  the  functionality, API  and  configuration  of  the AUTOSAR  BSW
module DET (Development Error Tracer) as specified in [1] and [2].

Supported AUTOSAR Release*:
3 and 4
Supported Configuration Variants:
pre-compile

Vendor ID:
DET_VENDOR_ID 30
Module ID:
DET_MODULE_ID 15

* For the precise AUTOSAR Release 3.x and 4.x please see the release specific documentation.

The DET is the central error handler in the AUTOSAR architecture during the development
phase. All other basic software modules can report development errors to the DET.


3.1
Architecture Overview
The following figure shows where the DET is located in the AUTOSAR architecture.

Figure 3-1  AUTOSAR architecture

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The  following  figure  shows  the  interfaces  to  modules  adjacent  to  DET.  These  interfaces
are described in chapter 6.
<any BSW module>
EcuM
Application
Dlt
COM
IPDU
Report
Init /
Callout
Forward
error
Start
error
DET

Figure 3-2  Interfaces to adjacent modules of the DET

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4  Functional Description
4.1
Features
The features listed in this chapter cover the complete functionality specified in [1] and [2].
The  "supported"  and  "not  supported"  features  are  presented  in  the  following  two  tables.
For further information of not supported features also see to chapter 8.

The following features described in [1] are supported:
Feature
Initialization and start services
Error reporting service
Table 4-1   Supported SWS features

The following features described in [1] and [2] are not supported in GENy:
Feature
Service port interface is only supported in Configurator 5
Forwarding of DET errors to the DLT module is only supported in Configurator 5
Table 4-2   Not supported AUTOSAR 3 and 4 SWS features
The following features described in [2] are not supported:
Feature
Configurable list of error hooks (use the DET entry callout instead)
Debugging support (AUTOSAR debugging concept)
Table 4-3   Not supported AUTOSAR 4 SWS features
4.2
Initialization
The DET is initialized and operational after the API Det_Init has been called. In [1] and
[2] an additional Det_Start service is specified to handle cases where it is necessary to
split the initialization in two phases. Since this is not applicable the Det_Start function is
empty.
In  the AUTOSAR  4  variant  the API  Det_InitMemory  may  have  to  be used  in  addition,
please refer to the API description 6.2.2 for details.
4.3
States
The DET has no internal state machine, it is operational after initialization.
In the AUTOSAR 4 variant the module uses its initialization state to perform a check if the
module has been initialized.
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4.4
Main Functions
The DET has no main function since it does not perform cyclic tasks.
4.5
Error Handling
Since the DET is the centralized error handler it does not  use error handling services  of
other BSW modules.
4.6
Debugging with the DET
The DET is called for each development error which is reported by other BSW modules.
Since  it  is  potentially  not  safe  to  continue  the  program  when  such  an  error  occurs,  the
default implementation of the DET is an endless loop.
A breakpoint should always be set in this loop. When the breakpoint is hit, the parameters
of the function Det_ReportError 6.2.4 can be inspected in the debugger. By means of
these parameters it is possible to find out which error occurred; it is however sometimes
more convenient to use a stack trace if the debugger provides this.

A breakpoint should always be set in the endless loop

If a simulated target based on the CANoe emulation environment is used the endless loop
is replaced by an error message in the CANoe write window.
4.6.1
Extended Debug Features
Sometimes  the  provision  of  the  endless  loop  is  not  sufficient  for  debugging,  therefore
some extended debug features are provided. These features are thought as a debugging
aid, thus they are accessible via the debugger and do not have special APIs.
To use these features the attribute “Enable Extended Debug Support” must be enabled (s.
7.1.2).
4.6.1.1
Filters
Sometimes  it  happens  that  a  BSW  module  reports  DET  errors  which  are  known  to  be
uncritical.  Such  errors  can  be  ignored  by  discarding  the  related  calls  to
Det_ReportError.
To  implement  this  functionality  the  DET  provides  a  set  of  filters  where  the  errors  to  be
discarded can be configured. It is possible to use the patterns 0xff or 0xffff as wild cards
(don’t care patterns).
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Configuration of filters
  configure the required number of filters in configuration tool with the attribute

“Number of Global Filters” (s. 7.1.2)
  enable filtering globally in the debugger by setting
detStatus.globalFilterActive to 1

  configure the required filters in the debugger by setting detGlobalFilter
elements

Filter examples
  a) ignore error 3 of API7 of module 20 in instance 0
  moduleId=20
  instanceId=0
  apiId=7
errorId=3
b) ignore all errors of module 20 in instance 0
  moduleId=20
  instanceId=0
  apiId=0xff
  errorId=0xff

4.6.1.2
Logging
The DET provides a log buffer for incoming error messages. Error messages which have
been filtered are not logged.
The contents of the log buffer can be viewed with the debugger.

Configuration of logging
  configure the required size of the log buffer in the configuration tool with the

attribute “Size of Log Buffer” (s. 7.1.2)
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  enable logging globally in the debugger by setting detStatus.logActive to 1

Logging example
  The variable detStatus.logIndex shows the index in the log buffer with the last logged
development error. Use the elements of detLogBuffer to view the logged errors.

By default all elements of the variable (s. above) detLogBuffer are initialized with zero.

By  setting  detStatus.breakOnLogOverrun  in  the  debugger  it  is  possible  to  enter  the
endless loop if the log buffer is full.
4.6.1.3
Break handler
For some errors it is possible to continue operation. Therefore it  is possible to unlock the
endless loop with the debugger to continue the program. Since the same error could occur
multiple times and to avoid ending up in the endless loop again it is possible to configure a
special filter set for the break handler. Such errors are logged (if logging is active) but do
not lead to a break.

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Configuration of break handler filters
  configure the required number of break handler filters in configuration tool

with the attribute “Number of Break Handler Filters” (s. 7.1.2)
  enable break handler filtering globally in the debugger by setting
detStatus.breakFilterActive to 1

  configure the required break handler filters in the debugger by setting
detBreakFilter elements

For some filter examples please refer to 4.6.1.1.
In  the  following  example  it  is  described  how  the  endless  loop  can  be  unlocked  in  the
debugger.
How to unlock the endless loop
Set detStatus.unlockBreak to 1 to leave endless loop:

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4.7
Extension of the DET
Sometimes  the built-in  debug features of the DET may not  be sufficient  or some special
handling of errors is required. Examples for such use cases include:
Logging of DET errors via debug interface
Transmission of DET errors on a serial bus system
Error  handling  which  requires  direct  access  to  the  hardware  (e.g.  disabling  of
specific interrupts)
Complex application specific error handling
To
support
such
extensions
the
DET
provides
a
DET
entry
callout
(Appl_DetEntryCallout) which is called first when the DET is entered. The callout has
to  be  provided  by  the application.  It  receives  all  parameters of  the  DET’s error  reporting
function. Depending on the return code the DET continues or abandons error handling. For
details  please  refer  to  API  description  in  chapter  6.3.1.  This  feature  is  enabled  by  a
configuration parameter as described in chapter 7.1.2.
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5  Integration
This chapter gives necessary information for the integration of  the  MICROSAR  DET  into
an application environment of an ECU.
5.1
Scope of Delivery
In the delivery of the MICROSAR DET the files listed in 5.1.1 and 5.1.2 are contained.
5.1.1
Static Files
File Name
Description
Det.c
This is the source file of the DET
Det.h
This is the header file of the DET
Table 5-1
Static files
5.1.2
Generated Files
The dynamic files are generated by the configuration tool.
File Name
Description
Det_cfg.h
This is configuration header file containing pre-compile parameters.
Table 5-2
Generated files
5.2
Include Structure
The DET includes the headers mentioned in the previous chapters 5.1.1 and 5.1.2.
In addition the file Std_Types.h is included.
To support the AUTOSAR memory mapping concept the header MemMap.h is included.
5.3
Handling of Recursions
If DET errors occur within the call context of the DET recursions could be caused. This can
happen in the following cases:
A  DET  error  occurs  in  one  of  the  interrupt  enabling  or  disabling  functions  which
are used by the DET on its own to protect critical sections of the DET.
In an Appl_DetEntryCallout or a subroutine of Appl_DetEntryCallout if
BSW API functions are used there.
These cases are handled by an internal locking mechanism in the DET so the application
needs not to take care of them. It should however be noted that in case of a recursion the
DET might skip a callout or its internal error logging.
If forwarding of errors to the DLT module is used (Configurator 5 only) the DLT module is
responsible for preventing potential recursions which could occur if a DET error is reported
by  the  DLT  module.  The  MICROSAR  implementation  of  the  DLT  module  considers  this
requirement.
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5.4
Critical Sections
The DET has code sections which need protection against preemption. Therefore the DET
uses  one  exclusive  area  which  typically  requires  an  interrupt  lock  up  to  the  highest
interrupt level where DET error reports can be produced:
DET_EXCLUSIVE_AREA_0
This exclusive area is short and only relevant if the logging feature is activated.
5.5
Usage Hints for Operation in Safety Related ECUs
The  silent  BSW  concept  assures  that  a  BSW  module  does  not  corrupt  memory  of  the
application  and  other  BSW  modules.  In  this  context  the  following  aspects  have  to  be
considered for the DET:
In  the  callout  function  Appl_DetEntryCallout  the  DET  passes  four
parameters to the application which could be used as indices by the application.
Please  note,  that  the  DET  does  not  perform  plausibility  checks  of  the  value
ranges  of  those  parameters  because  the  errors  reported  to  the  DET  are  not
known  by  the  DET  in  advance.  The  producer  and  consumer  (could  both  be
application  code)  has  to  perform  plausibility  checks  of  the  index  parameters  if
necessary.
If  the  extended  debug  feature  “logging”  is  used  depending  on  the  scheduling
concept of the ECU DET errors could be logged from different contexts and it has
therefore  to  be  secured  that  the  critical  section  DET_EXCLUSIVE_AREA_0
reaches  up  the  highest  processing  level  of  the  application  which  can  produce
DET errors.
The application has to pass a valid pointer to the API  Det_GetVersionInfo. A
NULL  pointer  check  of  the  passed  pointer  parameter  is  only  available  in  the
AUTOSAR 4 variant of the DET.
The  DET  is  intended  for  the  development  phase  of  an  ECU.  If  it  is  used  in
production  code  the  extended  debug  features  should  be  switched  off  because
they are only relevant if a debugger is attached.

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6  API Description
6.1
Interfaces Overview
The DET provides the four services
Det_Init for initialization,
Det_InitMemory for initialization (AUTOSAR 4 only),
Det_Start for additional initialization purposes,
Det_ReportError for reporting of development errors and
Det_GetVersionInfo for version information.
They are described in detail in the following sections.
6.2
Services Provided by MICROSAR DET
The MICROSAR DET API consists of services, which are realized by function calls.
6.2.1
Det_Init
Det_Init
Prototype
void Det_Init  ( void )
Parameter
-
-
Return code
-
-
Functional Description
Initializes the DET.
Particularities and Limitations
>  Should only be called once by the EcuM when the system is started
Expected Caller Context
>  Should be called from a safe context on task level
Table 6-1   Det_Init
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6.2.2
Det_InitMemory
Det_InitMemory
Prototype
void Det_InitMemory  ( void )
Parameter
-
-
Return code
-
-
Functional Description
Initializes the state variable for the un-init check of the DET. If this function is used it must be called before
Det_Init.
Particularities and Limitations
>  Should only be called once by the EcuM when the system is started
>  Only needed if the startup code does not support initialized RAM
>  Only applicable for the AUTOSAR 4 variant
Expected Caller Context
>  Should be called from a safe context on task level
Table 6-2   Det_InitMemory

6.2.3
Det_Start
Det_Start
Prototype
void Det_Start  ( void )
Parameter
-
-
Return code
-
-
Functional Description
Starts the DET. This service currently has no functionality, i.e. the API function is empty.
Particularities and Limitations
>  Call could be omitted
Expected Caller Context
>  No restriction
Table 6-3   Det_Start

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6.2.4
Det_ReportError
Det_ReportError
Prototype
AUTOSAR 3:
void Det_ReportError  ( uint16 ModuleId, uint8 InstanceId,
  uint8 ApiId, uint8 ErrorId )
AUTOSAR 4:
Std_ReturnType Det_ReportError  ( uint16 ModuleId, uint8 InstanceId,
  uint8 ApiId, uint8 ErrorId )

Parameter
ModuleId
Module ID of calling module
InstanceId
The identifier of the index based instance of a module, starting from 0, If the
module is a single instance module it shall pass 0 as the InstanceId.
ApiId
ID of API service in which error is detected
(defined in SWS of calling module)
ErrorId
ID of detected development error
(defined in SWS of calling module)
Return code
AUTOSAR 3:

-
-
AUTOSAR 4:

Std_ReturnType
Always E_OK
Functional Description
Used to report errors from other BSW modules to the DET. If extended debug features are disabled the
DET enters an endless loop in case of an embedded target or issues an error message in the CANoe write
window in case of a simulated target.
For details please refer to chapter 4.
Particularities and Limitations
>  If this function is called the DET may enter an endless loop, therefore it is strongly
recommended to put a breakpoint in the DET.
Expected Caller Context
>  No restriction
Table 6-4   Det_ReportError
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6.2.5
Det_GetVersionInfo
Det_GetVersionInfo
Prototype
void Det_GetVersionInfo  ( Std_VersionInfoType *versioninfo )
Parameter
versioninfo
Version information of the DET
Return code
-
-
Functional Description
This API returns version information, vendor ID and AUTOSAR module ID of the component.
The versions are BCD-coded.
Particularities and Limitations
>  This API is only available if enabled in configuration (s. 7.1.2).
>  As an alternative the #defines described in [1] chapter 10.2 could be used to read this
information.
Expected Caller Context
>  No restriction
Table 6-5   Det_GetVersionInfo
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6.3
Services used by MICROSAR DET
In the following table services provided by other components, which are used by the DET
are  listed.  For details about  prototype and functionality refer to the documentation of  the
providing component.
Component
API
DLT
Dlt_DetForwardErrorTrace
Only if configured in Configurator 5.
Table 6-6
Services used by the DET

To allow for extensions of the DET a callout to the application is used.
6.3.1
Appl_DetEntryCallout
Appl_DetEntryCallout
Prototype
uint8 Appl_DetEntryCallout  ( uint16 ModuleId, uint8 InstanceId,
  uint8 ApiId, uint8 ErrorId )
Parameter
ModuleId
Module ID of calling module
InstanceId
The identifier of the index based instance of a module, starting from 0, If the
module is a single instance module it shall pass 0 as the InstanceId.
ApiId
ID of API service in which error is detected
(defined in SWS of calling module)
ErrorId
ID of detected development error
(defined in SWS of calling module)
Return code
uint8
0 continue DET processing
1 abandon DET processing
Functional Description
This function is used to extend the DET. The parameters can be used for application specific error
handling. By means of the return code the application can control further processing of the DET.
For details please refer to chapter 4.7.
Particularities and Limitations
>  This API is only available if enabled in configuration (s. 7.1.2).
>  This function has to be provided by the application.
Expected Caller Context
>  No restriction
Table 6-7   Appl_DetEntryCallout
6.4
Callback Functions
The DET does not provide callback functions.
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6.5
Configurable Interfaces
The DET does not provide configurable interfaces.
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6.6
Service Ports
Service ports are only supported in conjunction with the Configurator 5.
6.6.1
Client Server Interface
A client server interface is related to a Provide Port at the server side and a Require Port
at client side.
6.6.1.1
Provide Ports on DET Side
At  the  Provide  Ports  of  the  DET  the  API  function  described  in  6.2.4  is  available  as
Runnable Entity. Runnable Entities are invoked via Operations. The mapping from a SWC
client  call  to  an  Operation  is  performed  by  the  RTE.  In this  mapping  the  RTE adds  Port
Defined Argument Values to the client call of the SWC, if configured.
The  following  sub-chapter  presents  the  Provide  Port  defined  for  the  DET  and  the
Operation defined for the Provide Port, the API function related to the Operation and the
Port Defined Argument Values to be added by the RTE.
6.6.1.1.1
DETService

Operation
API Function
Port Defined Argument Values
ReportError
Det_ReportError
uint16 ModuleId
( IN uint8 InstanceId,
IN uint8 ApiId,
IN uint8 ErrorId )
Table 6-8   DETService
A separate  DETService  Port is needed for each AUTOSAR SW-C which  wants  to report
errors  to  the  DET  module  which  corresponds  to  the  service  port  of  the  SW-C.  Each
DETService  Port  needs  a  ModuleId  as  port  defined  argument  value.  This  value  is  set
automatically  and  symbolic  name  value  defines  for  the  ModuleIds  are  generated.  The
required service ports and their ModuleIds are configured in Configurator 5.
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7  Configuration
In the MICROSAR DET the attributes can be configured with the following methods:
>  Configuration in GENy, for a detailed description see 7.1
>  Configuration in Configurator 5, for a detailed description refer to the online help
7.1
Configuration with GENy
The MICROSAR DET is configured with the help of the configuration tool GENy.
7.1.1
System Configuration
To use the DET it must be enabled in the system configuration in GENy.

Figure 7-1  Enabling the DET in the GENy system configuration
7.1.2
Component Configuration
In the following screenshot the component configuration of the DET is shown.

Figure 7-2  Component configuration of the DET

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Details  about  the  configuration  parameters  are  given  in  Table  7-1.  The  usage  of  these
parameters for the extended debug support is described in chapter 4.6.1.

Attribute Name
Configuration  Value
Values
Description
Variant
Type
The default value
is written in bold
Global settings
Enable Development  Pre-compile
boolean
On/off
Enable reporting of development
Error Tracer
errors.
Get Version Info
Pre-compile
boolean
On/off
Enable the function
Det_GetVersionInfo() to get the
major, minor and patch version
information.
Entry Callout
Pre-compile
boolean
On/off
Enable the function
Appl_DetEntryCallout to support
user specific extensions.
Extended Debug support
Enable Extended
Pre-compile
boolean
On/off
Enable extended debug support
Debug Support
features including filtering, logging
and flexible break handling.
Number of Global
Pre-compile
integer
0..255
Number of global filters which can
Filters
be used to discard irrelevant
errors.
Number of Break
Pre-compile
integer
0..255
Number of break handler filters
Handler Filters
which can be used to exit the DET
without entering the endless loop.
Size of Log Buffer
Pre-compile
integer
0..255
Size of the log buffer which can be
used to log errors reported to the
DET.
Table 7-1   DET configuration parameters

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8  AUTOSAR Standard Compliance
8.1
Deviations
8.1.1
Support of Service Port Interface
The current version supports the AUTOSAR service port interface only for the Configurator
5. If the DET should be used to log application errors and the tool GENy is used the SWCs
should call the DET directly.
8.1.2
Support of AUTOSAR Debugging Concept (AUTOSAR 4)
Forwarding of DET errors to the DLT module is only supported for the Configurator 5.
The AUTOSAR debugging concept is not supported.
8.1.3
Support of Configurable List of Error Hooks (AUTOSAR 4)
This feature is not supported; the extension mechanism (DET entry callout)  can be used
instead.

8.2
Additions/ Extensions
8.2.1
Extended Debug Features
Since  AUTOSAR  specifies  only  the  interface  and  not  the  functionality  of  the  DET  all
provided debugging features are AUTOSAR extensions.
8.2.2
DET Extension Mechanism
Since  AUTOSAR  does  not  specify  a  mechanism  how  the  DET  can  be  extended  by
application code a callout was added.
8.3
Limitations
None

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Technical Reference MICROSAR DET

9  Abbreviations
Abbreviation
Description
API
Application Programming Interface
BSW
Basis SoftWare
DEM
Diagnostic Event Manager
DET
Development Error Tracer
DLT
Diagnostic Log and Trace
pPort
Provide Port
rPort
Require Port
RTE
RunTime Environment
SWC
SoftWare Component
Table 9-1   Abbreviations

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10 Glossary
Term
Description
Stack trace
A stack trace (also called stack backtrace or stack traceback) is a report
of the active stack frames instantiated by the execution of a program.
Although stack traces may be generated anywhere within a program, they
are mostly used to aid debugging by showing where exactly an error
occurs. The last few stack frames often indicate the origin of the bug.
Table 10-1 Glossary

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11 Contact
Visit our website for more information on

> News
> Products
> Demo software
> Support
> Training data
> Addresses

www.vector-informatik.com

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Version: 2.4.0
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Last modified October 12, 2025: Initial commit (1fadfc4)