sof and pof behaves differently for Max 10

Thank you sstrell and JohnT.

Yes, after downloading the POF, I did power down and power up and reset.

The design is a UART receiver and CRC checker. If CRC passed, we update certain registers to the value received. if CRC failed, then we don't update the registers.

we have 3 version of the RTL,

1. for first version, SOF and POF works great.
2. for 2nd version, we changed some other logic not related the UART function. and for this compile, SOF works, and POF not working.
3. based on 2nd version. I added signal tap analyzer in the design trying to debug where the problem is. I did not change any of the RTL. for this version, SOF and POF both works well.

So, this looks very strange to me, meaning, the 2nd version, the netlist is slightly different than the 1st or 3rd version, and this causes the POF not working.

Thanks