Fatal: (vsim-3421) Value -1 is out of range 0 to 2147483647 - Fatal: (vsim-3421) Value -1 is out of range 0 to 2147483647 Description You may see this error in the Quartus® II software version 9.1 SP1 and earlier, during simulation of Arria II GX designs containing ALTLDVS IP. The error may occur when you specify a SERDES implemention in LEs and a de-serialization factor of 4 in the IP MegaWizard® Plug-In. A patch is available to fix this problem for the Quartus II software version 9.1 SP1. Download and install the appropriate patch from the following links: For Windows: Download the Quartus II software version 9.1sp1 Patch 1.24 for Windows (.exe) Download the Readme for the Quartus II software version 9.1sp1 Patch 1.24 for Windows (.txt) For Linux: Download the Quartus II software version 9.1sp1 Patch 1.24 for Linux (.tar) Download the Readme for the Quartus II software version 9.1sp1 Patch 1.24 for Linux (.txt) You must regenerate Altera simulation libraries after you install the patch. ModelSim-Altera users must manually compile and map the altera_mf library to replace the precompiled version included with ModelSim-Altera. This problem is scheduled to be fixed in the next release of the Quartus II software Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Arria® II GX FPGA'] ['novalue'] ['novalue'] ['novalue']