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AR# 36472

ISE Simulator (ISim) - ERROR: The simulation failed to launch for the following reason. Failed to communicate with child process


When I attempt to launch ISim from the ISE design tools, I receive a prolonged "elaboration" message followed by an error as shown below:

ERROR: The simulation failed to launch for the following reason: Failed to communicate with child process.  Please shut down ISim and retry the simulation.  If the problem persists, please contact Xilinx support.
Time resolution is 1 fs
Unable to execute live simulation command.

How can I resolve this error?


This issue is known to occur if the simulation executable has been generated incorrectly or has been corrupted.
To resolve this issue, use "Clean Up Project Files" from the Project menu in Project Navigator to force the simulation scripts to regenerate the simulation executable.

The error message has also been seen in ISE 14.x on a machine with server tools installed.
In this case the software was Powerbroker-server-Unix.

After uninstalling the previous software, ISIM worked without issues.
AR# 36472
Date 12/16/2014
Status Active
Type General Article
  • ISE Design Suite - 11.1
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