AR# 15614: 6.1i MAP - "FATAL_ERROR: MapHelpers: mhcconstimp.c:220: 1.16 - LOC has not yet been resolved"
6.1i MAP - "FATAL_ERROR: MapHelpers: mhcconstimp.c:220: 1.16 - LOC has not yet been resolved"
Keywords: 5.1i MAP, LOC, resolved, MapHelpers
General Description: When I run 5.1i MAP on a design, the following error is reported:
"FATAL_ERROR:MapHelpers:mhcconstimp.c:220:1.16 - LOC has not yet been resolved. Unable to determine which parts of the LOC apply in order to check against the area group range. Process will terminate. To resolve this error, please consult the Answers Database and other online resources at http://support.xilinx.com. If you need further assistance, please open a WebCase by clicking on the "WebCase" link at http://support.xilinx.com."
The problem that causes this error is related to a carry chain that contains a mixture of LOC'd and area-constrained logic. You can avoid the issue either by using area constraints exclusively on the carry chain, or by removing the area constraint.
This will be fixed in the next major software release (after 6.1i).