Hi,
It looks like a bug to me, either in VFP or the redirector or both, it occurs after the OS tries a FASTIO_QUERY and does cleanup correctly.
See the filemon log below:-

vfp9.exe:2628	FASTIO_QUERY_BASIC_INFO	G:\techdev\libs\csclasses.vcx	FAILURE		
vfp9.exe:2628	IRP_MJ_QUERY_INFORMATION	G:\techdev\libs\csclasses.vcx	SUCCESS	FileBasicInformation	
vfp9.exe:2628	IRP_MJ_CLEANUP	G:\techdev\libs\	SUCCESS		
vfp9.exe:2628	IRP_MJ_CLOSE 	G:\techdev\libs\	SUCCESS		
vfp9.exe:2628	IRP_MJ_CREATE 	G:\techdev\libs\csclasses.vcx	SHARING VIOLATION	Options: Open  Access: All	
vfp9.exe:2628	FASTIO_QUERY_OPEN	G:\techdev\libs\csclasses.vcx	FAILURE		
vfp9.exe:2628	IRP_MJ_CREATE 	G:\techdev\libs\csclasses.vcx	SUCCESS	Options: Open  Access: All	

>Is there anything special about the library? What if you move it to a local drive?
>
>>Ran the build with debug, the error is in the class libraries
>>

>>Build Project: Visual Class Library csclasses
>>   Module:  keypress
>>

>>I removed the code I had in the keypress event of the first subclass and it just stopped at
>>

>>Build Project: Visual Class Library csclasses
>>

>>
>>I can compile the libs separately with no problem.
>>