I am getting a syntax error on the following line in my PBP file (PBP V2.45):

CMCON0 = 7

But it's compiles fine if I replace it with:

POKE $19, 7

I rechecked my typing and I am spelling the register name correctly. The other registers can be written to using their names. Why does just this one produce a syntax error? Anyone seen this before?

Jim