ran into this problem today when using the 'pp'. I found that the AddScrollbars.al is apparently a split off (autosplit?) from Frame.pm
In the latter I found indeed all the code, but after the __END marker.
Finally, I moved the "1; __END" to after all the code, then did a new 'gmake install'.
After this, my GUI seems to run OK as EXE (on Windows)