Error (12002): Port "jtag_debug_clkx2" does not exist in macrofunction "nios2_qsys_0"

Description

Due to a problem in the Quartus® II software version 12.1, this error may be seen when Level 4 debug is enabled within Nios II IP.

Resolution

To workaround this issue in the Quartus II software version 12.1 follow the steps below:

1. Open the top level Qsys HDL file in a text editor
2. Change the port name "jtag_debug_clkx2" to "clkx2"
3. Recompile the design in Quartus II

Note: If you regenerate your QSYS system you will need to repeat the steps above.

This problem is scheduled to be fixed in a future release of the Quartus II software.