AR# 46977

Description

I am receiving Error messages similar to the following in Synthesis.

ERROR:Xst:2883 - Option "-verilog2001" is not available for the selected device family.
ERROR:Xst:2883 - Option "-mux_extract" is not available for the selected device family.

What is the problem?

Solution

1. If Synthesis is launched in Project Navigator, the .xst file that contains the options that are causing the errors is generated automatically.
   In this case, the issue is probably caused by a bad installation.
   A reinstallation can resolve it.
    
2. If Synthesis is run in the command line with a user-created .xst file that contains the options that are causing the errors, the issue can occur when these options are no longer valid or supported for the given device or the ISE version that is using.
   For example, the option "-verilog2001" is deprecated in the new parser for V6/S6 and newer devices.
   This is because Verilog 2001 support cannot be switched off in the new parser.
   The solution is to remove these options from the .xst file.