Forum Discussion
Altera_Forum
Honored Contributor
16 years agoThat's your problem right there - due to the time-limited features used in the SOPC design, the Opencore IP popup must stay open otherwise you'll encounter errors downloading the ELF file.
Make sure you are running Quartus 9.1SP2 (Web Edition) and NIOS II EDS 9.1. Try rebuilding the Quartus Project to regenerate the SOF. Everything builds and downloads successfully in 9.1SP2 which I am using - so there shouldn't be any problem there.