FPGA simulation exceeds maximum simulated time

I am running a very simple FPGA simulation (LV2014) which appears to function correctly. However, after 60 seconds of operation, I get the following pop-up:

     LabVIEW FPGA reported the following error:

     The simulation has exceeded the maximum simulated time.

Checking on-line, it looks like the maximum simulated time should be 9223372 seconds.

Any ideas on what might be causing the shortened time?