Microsoft KB Archive/69966

CVPACK Can Cause CVW to Display “ ” Message ID Number: Q69966

3.00 WINDOWS

Summary:

In some situations, the CVPACK program, which consolidates the debugging information for the CodeView debugger, will lose information about the types of local variables.

More Information:

Sometimes the compiler or the CVPACK program will remove information that is necessary for CVW to display variables properly in a local watch window. When the information is lost, the “locals” window will not display any type information. Instead, “ ” will be displayed.

When this problem occurs, do the following:


 * 1) Disable the Microsoft C Compiler’s optimizations with its -Od switch.
 * 2) Try to debug a version of the file that has not been processed with CVPACK.
 * 3) Declare structure variables with their tag types, instead of through pointers to the types, and make assignments to the component fields from these structures. It may also be helpful to add the “volatile” declaration to these structures.

These three suggestions may force the compiler to generate debug information for the offending types. These steps may be helpful in this process. If, after trying these steps, problems remain, please contact Microsoft Product Support Services.