18. What happens if I prematurely terminate a Platform Cable USB CPLD update operation?
If a CPLD re-programming operation is interrupted (i.e., by unplugging the cable or terminating the iMPACT session), the CPLD should be detected as an erased device during a subsequent "Cable Setup" operation. Consequently, the update operation should be repeated and the CPLD should be successfully programmed.

NOTE: In the event that iMPACT no longer attempts to reprogram the CPLD after a premature termination of the operation, a XILINX environment variable can be used to force the reprogramming operation. This method should only be used in exceptional cases.

Shell to a DOS window and set the following environment variable to true:
SET XIL_IMPACT_ENV_USB2_FORCE_CPLD_UPDATE=TRUE

Invoke iMPACT from the DOS command level.

Select "Platform Cable USB" from the Cable Setup menu and wait for the update to be completed.

Exit iMPACT.

Set the environment variable to false:
SET XIL_IMPACT_ENV_USB2_FORCE_CPLD_UPDATE=FALSE