Help Progaming Spansion mem chip

this is a bit tricky. you are using 3rd party SPI flash as a configuration memory instead of EPCS, the altera support won't help you with this :)

anyway, erase successful only means quartus II has successfully sent erase command to the flash, it is not certain whether the erase command really erases the chip until you do a blank check. same goes to program, you got to verify the contents and since it fails, the .pof's contents are not programmed into the flash.

try to identify where it fails. maybe you might want to compare the datasheet for EPCS vs. spansion flash, check especially the SPI command timing diagram and command's opcode.