Due to a problem in the Quartus II software version 15.0 and earlier, you may see this internal error if you change the JTAG pin assignment from the default value.
In MAX® 10 devices, JTAG pins are dual purpose pins. If you use the JTAG pin as a dedicated pin, you do not need to do any pin assignment for the pin. You may getting this internal error if you edit the pin assignment to anything other than the default value.
To avoid the error, perform one the following steps:
- Revert back all JTAG pin I/O standard to default IO standard in pin planner.
- Change to the default I/O standard to 3.3-V LVCMOS
- Go to Assignments -> Device -> Device and Pin Options -> Voltage -> change "Default I/O standard" to 3.3-V LVCMOS
This problem is scheduled to be fixed in a future release of the Quartus Prime software.