My design crashes during MAP in the phase "Mapping design into LUTs...". Are there any known problems that cause this failure mode?
A case has been seen where MAP crashed during this phase due to a bug related to register pushing into DSP48Es. This bug will be fixed in version 10.1. Meanwhile, the problem can be avoided by setting an environment variable to disable the register push:
Linux and Solaris
setenv XIL_MAP_NO_DSP48E_AUTOREG 1
For general information about setting ISE environment variable, see (Xilinx Answer 11630).