1. Are you building to a single .EXE file, or are you using dynamic libraries and producing .PBD files (pcode) or .DLL files (machine code)? If you don't use dynamic libraries, you'll have to use a .PBR file to specifically reference the datawindow objects and include them in the compiled build.
2. Compare the library list of the target on a build that "works" and the library list of the target on the machine that is used to compile the .EXE/.PBD files. (It's a best practice to use a dedicated build machine, so that it's not impacted by code that's still under development.)
Make sure they're exactly the same, and the PBLs are listed in exactly the same order.
3. Could you have any duplication of datawindow object names in the PBLs? Not a good idea...
