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You may receive the "Debugger swap error" error message when you use eMbedded Visual C++ 4.0 to debug an application that is running on a device that is running Windows CE

Article ID: 895421

Article Last Modified on 3/14/2007

APPLIES TO

Microsoft eMbedded Visual C++ 4.0
Microsoft Windows CE Platform Builder 4.0
Microsoft Windows CE Platform Builder 4.1
Microsoft Windows CE Platform Builder 4.2
Microsoft Windows CE 5.0

SYMPTOMS

When you use Microsoft eMbedded Visual C++ 4.0 to debug an application that is running on a device that is running Microsoft Windows CE, you may receive the following error message:

Debugger Swap Error
eVC cannot locate a debugger able to debug the attached device. The debugging session cannot begin.

CAUSE

This behavior occurs because eMbedded Visual C++ 4.0 only recognizes a subset of the processor types that the Windows CE operating system supports. If the device returns a processor type that eMbedded Visual C++ 4.0 does not recognize, eMbedded Visual C++ 4.0 cannot locate the correct debugger for the device.

RESOLUTION

To resolve this behavior, the device manufacturer must modify the OEMInit function to return a processor type that eMbedded Visual C++ 4.0 recognizes. For example, the device manufacturer must add lines of code that are similar to the following to the OEMInit function.

extern DWORD CEProcessorType;
CEProcessorType = PROCESSOR_STRONGARM;

eMbedded Visual C++ 4.0 currently recognizes the following processor types:

PROCESSOR_ARM720
PROCESSOR_ARM820
PROCESSOR_ARM920
PROCESSOR_STRONGARM

STATUS

This behavior is by design.

MORE INFORMATION

For more information, visit the following Microsoft Developer Network (MSDN) Web sites:

Microsoft Windows CE .NET 4.2: ARM Microprocessor
http://msdn2.microsoft.com/en-us/library/ms898156.aspx

Platform Builder for Microsoft Windows CE 5.0: ARM Microprocessor
http://msdn2.microsoft.com/en-us/library/ms901737.aspx

Additional query words: eVC

Keywords: kbprb KB895421

Microsoft KB Archive/895421

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