>In addition to what Erick has suggested a form with a private data session can show some weirdness in the debugger as to the alais data.

No pDS, but this is even stranger. If I just put a STEP into the code before the SELECT, then RESUME, it works fine. If I don't have the STEP, then it doesn't change the ALIAS() and it bombs. Is it a refresh or focus issue? I'm not sure where to even go next given how it's behaving.