Thank you all for the comments. What I'm trying to do is simply to map a dynamic data area (WKINFO) using a static one (LKINFO). Any references to data after LKINFO will be in fact referencing the dynamic area after WKINFO instead. And it worked fine until that point inside the PATCH_AREA where the base register was suddenly changed from 8 to 13. I have many other similar samples working properly as I expected. But they are less complexes and smaller too. The error is being caused because the corresponding DROP is missing and I don't know how to drop it. I wonder why "USING area,map" accepts a data area as "map" but the DROP only accepts a register. I think the simplest solution is using a register instead of a data area to map it. And also why LKINFO is being shown as a negative offset in "LKINFO(X'FFFFE56C'),R13+X'2A94'" once it is defined inside the main CSECT addressed by R8 and not in the DSECT addressed by R13. It should be R8+X'2A94'. And again why X'FFFFE56C' (the same as -X'1A94')?
I don't know if I was clear enough. TIA João
