This is probably caused by a label that PBP is using to set configuration bits. PBP expects "_DEBUG_OFF_4L" to be defined in the MPASMWIN header file for the part. For whatever reason (probably related to MPASMWIN version), the label is not defined.

You can probably fix it by upgrading to the latest version of MPASMWIN.

You can also edit the PBP file 18F1320.INC. The debug bit defaults to off, so there's no reason for PBP to specify it. Comment the offensive label at the end of the line:

__CONFIG _CONFIG4L, _STVR_ON_4L & _LVP_OFF_4L ;& _DEBUG_OFF_4L