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Can't say anything regarding problem 1, except I didn't yet experience Quartus II to do things not set by the user.
Regarding problem 2, it seems to be exactly what the error message says, no design containing an SFL instance is loaded at that time. Did you try to load the factory default SFL *.sof file, shipped with Quartus?
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Thanks for your response. In the programmer window, when I add my .jic file, it shows "Factory default SFL" next to the EP2C8Q208 and the EPCS4 below, so that led me to believe that I was loading the necessary flash loader on the FPGA. The FPGA load is successful when trying the .jic, but it fails when it goes onto the second step - loading the EPCS4.
In any case, I tried what you said (loading the .sof that ships with Quartus). That too is successful, but I get the same error message when it goes to load the flash device. One issue that I noticed was that the device that is listed when I add the sfl_EP2C8.sof is the EP2C8F256, not the Q208 package. I can't switch it to the proper device.
As an aside, I erased one of the good boards that already has been programmed and did allow me to reprogram. Once erased it has the same problem as the new boards, so this is definitely a Quartus/programming issue, not a hardware issue.
Thanks for your help.
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