Internal Error: Sub-system: U2B, File: /quartus/db/u2b/u2b_av_m10k_param.cpp, Line: 2021 - Internal Error: Sub-system: U2B, File: /quartus/db/u2b/u2b_av_m10k_param.cpp, Line: 2021 Description Due to a problem in the Quartus® II software version 13.0sp1dp6 or earlier, you may see this internal error when you compile an Arria® V or Cyclone® V design that contains an FFT IP. Resolution This problem is fixed beginning with the Quartus II software version 13.1 Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 13.1 13.0.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']