Hello ALL, if I defined in L166Locate- µVision DPP USAGE NDATA DPP2(0xC000-0xE7FF) and in one of my a.66 file ASSUME DPP1 : NCONST ASSUME DPP2 : NDATA ASSUME DPP3 : SYSTEM ?ND?Test section data word 'NDATA' test DSW 1 ?ND?Test ENDS and in the h-file: extern int test; Why it's still not enough declarations and I get error for 'test' : missing DPP information? If I use an explicit declaration there is no an error. But I don't want use this way. Thanks, with best regards, A.