Internal Error: Sub-system: U2B, File: /quartus/db/u2b/u2b_translator_av_hmcphyint.cpp, Line: 2939 - Internal Error: Sub-system: U2B, File: /quartus/db/u2b/u2b_translator_av_hmcphyint.cpp, Line: 2939 Description Due to a problem in the Quartus ® II software version 12.0 SP2, you may see this error during fitting if your design includes a Hard Memory Controller and it targets an Arria® V device. Resolution To work around this problem, download and install patch 2.18 from the links below. You must install the Quartus II software version 12.0 SP2 before installing this patch. Download the version 12.0 SP2 patch 2.18 for Windows (.exe) Download the version 12.0 SP2 patch 2.18 for Linux (.tar) Download the Readme for the Quartus II software version 12.0 SP2 patch 2.18 (.txt) This problem is fixed beginning with the Quartus II software version 12.1. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.1 12.0.2 ['Arria® V GT FPGA', 'Arria® V GX FPGA', 'Arria® V ST FPGA', 'Arria® V SX FPGA'] ['novalue'] ['novalue'] ['novalue']