Try file #9513.

>I have a Class Library common_libs.vcx
>
>Looking at it in the Class Browser there is a class cntPartno
>
>within cntPartno are several subclasses (cntAvl, cntExcess, cntMRB, etc.)
>
>I want to create a new subclass cntDMR which will be a duplicate of cntMRB.
>
>I Created a new ClassLib (clsTemp.vcx)
>
>I opened two instances of the class browser. In the first one I opened common_libs. In the second I opened clsTemp.
>
>In the first class browser I clicked on cntMRB. I then CTRL-Clicked on the icon just to the left of the drop-down at the top of the screen and dragged it into the second class browser. I now have cntMRB showing in both class browsers.
>
>I renamed the class in the second browser and CTRL-Click dragged it back to the first. The renamed class shows up in the first browser where I expect (underneath cntPartno)
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>I then modified cntMRB by putting a MESSAGEBOX statement so that I could tell I was working with the correct library.
>
>Everything works fine in my test environment within VFP.
>
>However, when I compile the APP file and install it into my production environment I get a "Class Definition cntDMR is not found" message. Invoking cntMRB shows the new MESSAGEBOX.
>
>Have I done anything wrong in the way I created this new class?
>
>Any suggestions on how to fix this will be greatly appreciated.
>
>Thanks to all.........Rich