Why do I get errors during Analysis & Synthesis when using multiple IP cores? - Why do I get errors during Analysis & Synthesis when using multiple IP cores? Description If you compile a design with multiple IP cores, you may encounter the errors below: Error (12179): Instance " <instance name> " is ambiguous File: <file name> , Line: < line number> Error (12180): Instance could be entity <entity name> in file <file name> compiled in library <first library name> File: <file name> , Line: < line number> Error (12180): Instance could be entity " <entity name> " in file <file name> compiled in library <second library name> File: <file name> , Line: < line number> Resolution These errors indicate a conflict in files generated for multiple IP cores. Each IP core should be compiled into its own design library as indicated in its Quartus II IP ( .qip ) file. If you see these errors, verify that your Quartus II Settings File ( .qsf ) file only calls out the .qip files for each IP core. You should not include any of the files listed in the .qip file directly in the .qsf . Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']