When debugging a program, it may be helpful to set breakpoints and have them held between debugger sessions. The breakpoints are usually stored in a file named for the user and with a .adb extension that is created during the initial debugger session. For example, if the user's login is rsmith, the file containing the breakpoints would be named rsmith.adb. However, in this particular case, no .adb file was being created and therefore no breakpoints were being held.
If you define the ACUCOBOL variable twice, each pointing to a different version directory, this creates a conflict. Due to this conflict, no .adb file was being created. Removing one of the ACUCOBOL definitions will allow the .adb file to be created.