Thanks Sergey,

It looks like it's building all my forms and prg files ok.
That's the last thing the debugger shows - my last .prg file being built.

A few additional datapoints:
1. I can rebuild the project ok and don't see the error.
2. After the error occurs a small .exe file has been created.
When I execute it, it asks me to select an .fxp file to run.
3. Since I suspected a COM registration problem, I tried regenerating
the GUID for the program but this did not help.
4. I suspect that Visual SourceSafe may have something to do with this
since I checked everything in with keep checked out between the last
ok build and the failure - not much else was done but that and an
InstallShield build.
I made all files writeable while looking at the problem but no help.

Howard



>Howard,
>
>Launch VFP debugger before build. The build log will be streamed to the Debug Output window. It may help you find where error happens.
>
>>Today I started seeing this error when I build my project and generate an .exe file:
>>
>>Function argument value, type, or count is invalid.
>>
>>The error appears near the end of the build process.
>>The last thing I can see on the status line looks like it's registering a COM server - an OLEPUBLIC class.
>>
>>This is a project I've been working with for a long time.
>>
>>I've done the following:
>>1. Restored my project from a backup copy.
>>2. Reinstalled VFP9 SP1.
>>3. Looked at Filemon and Regmon logs of the build.
>>
>>How can I get more information about what the problem is?
>>
>>Thanks,
>>