Instant Interrupts - Revisited

[circuitpro]

With the PBPL box checked in the compiler options, when I put in your
3 INCLUDE statements:

INCLUDE "DT_INTS-18.bas"
INCLUDE "ReEnterPBP-18.bas"
INCLUDE "Elapsed_INT.bas"

I get a compile error saying:

Error [113] c:\blue1\pbp\pbppi18l.lib 1465: Symbol not previously defined (INT_ENTRY_H)

Does that mean anything to you? No errors without those INCLUDES. No errors if I change to PBP instead of PBPL. (except my LONG variable errors, of course!)