Hi All, Using the following construction MPLAB it retursn a error: Ifdef __PIC685 INCLUDE "P16F685.INC" Else ifdef __PIC628 INCLUDE "P16F628.INC" Else INCLUDE "P16F84.INC" Endif Is this construction not possible, i cant find anything in the helpile, or is it possible using something else. Harry -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist