Knowledge Base Article

Why does Nios® V processor simulation fail when using the generated VHDL testbench from Platform Designer?

Description

Due to a problem in the Quartus® Prime Standard Edition software version 25.1, Nios® V processor simulation may fail with the generated VHDL testbench system from Platform Designer for any processor design.  

This problem affects:  

  • All Altera® FPGA device families in Quartus® Prime Standard Edition software, and  
  • All Nios® V processor variants (Nios® V/g, Nios® V/m, and Nios® V/c processors).    

It is because the generation of the Nios® V processor VHDL testbench system is not supported in Quartus® Prime Standard Edition software version 25.1.

Resolution

To work around this problem in the Quartus® Prime Standard Edition Software version 25.1, please select “Verilog” at the “Create testbench simulation model” input option. 

This problem is currently scheduled to be resolved in a future release of the Quartus® Prime Standard Edition software. 

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