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AR# 33608

MIG v3.2 - Spartan-6 FPGA MCB - ise_flow.bat is missing the -w switch in the MAP command


The Spartan-6 FPGA MCB MIG design includes a script file, ise_flow.bat, in the output 'par' directory to run the design through implementation using the command line. 

This script file is missing the -w switch in the MAP command which causes an error if the design has already run: 


ERROR:Map:168 - Output file "example_top_map.ncd" already exists. Please specify -w to overwrite. 

ERROR:Map:151 - Problem encountered parsing the command line. 


The -w switch overwrites existing files from previous runs.

Because this switch is missing, MAP will not execute.


To fix this issue, Update the ise_flow.bat parameters for MIG v3.2.


  1. MIG generates the ise_flow.bat file in the output "mig_31\example_design\par" and "mig_31\user_design\par" directories. 
    Go to either of these directories.
  2. Open ise_flow.bat and edit the file.
    You will need to go to line 12 that starts with "map". 
  3. Insert "-w" into the line after the "-detail" comment.
  4. Save the file, and you should be able to re-run the file.  


This issue will be resolved in the next release of MIG in ISE 11.4.

AR# 33608
Date Created 10/02/2009
Last Updated 08/27/2014
Status Active
Type General Article