>>>Hi,
>>>
>>>I have made some changes to the program (nothing major). Then recompiled and rebuilt the application.
>>>
>>>Now, at the end of recompile, I get an error:
>>>

>>>Visual Class Library d:\applhome\libs\app_flds.vcx has the following errors:
>>>    Visual Class Library THIS - Undefined
>>>

>>>
>>>The odd thing is that I didn't make any changes to the app_flds.vcx. The library app_flds.vcx has many classes.
>>>The changes were in some other libraries.
>>>
>>>How do you suggest I find the cause of the error above?
>>>
>>>TIA
>>>
>>>UPDATE. I found where I mistakenly added reference to the OLD VCX library.
>>
>>Hi Dmitry,
>>Is it possible the VCX got corrupted? Maybe restore a backup and try again?
>
>Hi Frank,
>It is possible that the VCX is corrupted. But it should not be in the project. This is an older VCX that I removed from the project some time ago. And when I was writing another code, I mistakenly added the reference to the older VCX to the project. Hence I was getting the error. Once I found my error, and corrected it, the older VCX is no longer in the project. So, the problem is gone.
>Thank you.

Just as a note, I'd seen this sort of problem occur when I bring in stuff from another program (say, an older program) into the project. This imported stuff (e.g. forms) may contain references to an older VCX. When I build the project, the references to the older VCX will get pulled into the project. In such a case I have to go into all the stuff I'd imported to remove the references (e.g. open the SCX, VCX, etc. as DBF and change the references to the older VCX within the classloc column to the newer one).