Just to reiterate, possibly for future reference:
The reserved word DEFINE can be written any way you like, lower case, upper case, mixed case, whatever. It's WHAT you define (OSC on this case) that's case sensitive. It doesn't automatically mean everything should be UPPER CASE, it means it must match the case of the assembly code constant you're trying to "set". Thankfully all PBP assemnly code constants ARE all upper case.

/Henrik.