Description
Due to a problem in the Quartus II software version 12.1 SP1, you may see this internal error during the Fitter.
Resolution
A patch is available to fix this problem in the Quartus II software version 12.1 SP1. You must apply patch 1.dp6 from the related solution below before applying this patch. Download and install patch 1.dp6p from the appropriate link below:
- Download the version 12.1 SP1 patch 1.dp6p for Windows (.exe)
- Download the version 12.1 SP1 patch 1.dp6p for Linux (.tar)
- Download the Readme for the Quartus II software version 12.1 SP1 patch 1.dp6p (.txt)
This problem is fixed beginning with the Quartus II software version 13.0.