Nios 2 IDE download verification error

This thread may be long dead, but if you want to disable verification you can hack your nios2-download script to add the argument --no-verify when it calls nios2-gdb-server to actually do the work.

Of course this is not recommended since as Jesse said, if there is a verify failure then that probably means you got something wrong.

If you really are doing exceedingly clever stuff (for example with tightly coupled memories which aren't connected to the data master but are initialised from Quartus II) then you could use nios2-elf-objcopy to copy one elf file to another while removing the stuff you don't want to download. Then download the elf file with the unverifiable data stripped out of it.