Due to a problem in the Quartus® II software version 13.1 and earlier, you may see the following error when you regenerate the IP for PCIe if you have opened the IP wizard without a Stratix® V project being open.
Error: Simulation model generation failed: <installation path>//sopc_builder/bin/ip-make-simscript --spd=<project path>/<instance name>.spd --output-directory=<project path>/<instance name>_sim
To work around this problem, open or create a Stratix V project before launching the IP wizard.
This problem is scheduled to be fixed in a future release of the Quartus II software.