Why do I receive a Fatal Error when simulating the MGT in ModelSim 6.1?
The problem occurs because of a change made in an optimization function in the simulator. MTI is aware of this issue and is working on a solution.
In the meantime, there are two possible ways to work around this issue:
In ModelSim 6.1, use the "-nopartialatomic" flag with the vsim command.
vsim -nopartialatomic -L unisim work.SAMPLE_TB
Alternatively, use ModelSim 6.0x.