Type: Answers, Errata

Area: EMIF, Intellectual Property

Error Occurs When Running Simulation Example Design in ModelSim or Riviera-PRO


When you attempt to run the UniPHY simulation example design in ModelSim or Riviera-PRO, you may receive the following error:

Error: (vsim-125) The shared library ./submodules/libbytestream_pli.so being loaded was built on a 32-bit machine. A 32-bit shared library cannot be loaded in a 64-bit simulation. Please use compatible machines to build and load the library

This issue affects DDR2 and DDR3 protocols, and QDR II/II+ and RLDRAM II when using the Nios II-based sequencer.


There are two possible workarounds for this issue:

  • Use a 32-bit version of the ModelSim or Riviera-PRO executable.
  • In a text editor, open msim_setup.tcl under <variant_name>_example_design/simulation/verilog/mentor/ or <variant_name>_example_design/simulation/vhdl/mentor/. Locate the alias elab section and remove -pli /submodules/libbytestream_pli.so from the vsim line.