Description: ERROR:x4kma:387 - Unable to obey design constraints which require the combination of the following symbols into a single CLB: FMAP symbol "FMAP_149" (output signal=hdlc_tx_C168) There are more than two combinational outputs required. These symbols share the same LOC parameter.
This general error indicates that map was unable to follow some CLB packing instructions. One possible cause for this error is a known problem where map will pull FMAPs into CLBs because they drive the HMAP, without checking for conflicts. This behavior can be disabled by setting the following environment variable:
SET XIL_MAP_NO_FMAP_PACK = 1 (PCs) setenv XIL_MAP_NO_FMAP_PACK 1 (Work Stations)