Arria 10 auto configuration issue with EPCQ-L

Hi experts,

I come across a serious issue on my Arria 10 board, using 10AX016C4. Flash memory is EPCQ-L256

When I wrote program using jic-file with USB Blaster 2, some jic-file, call as "A.jic" here in after, caused auto configuration issue.

Once programming and verify have completed successfully, but after power off-on, auto configuration failed. Configuration has not done, and this was mysterious symptom though , JTAG-TDO port has become TDI through port, no clock delay, exact same with TDI.

As I cannot use JTAG port, because TDO doesn't run correctly, I erased EPCQ-L by Active Serial port. Then TDO port became Hi-Z correctly after next Power off-on. And I wrote A.jic again, the result was same, TDO fail.

But I wrote another jic-file, call as "B.jic" here in after, then auto configuration has done and my program in Arria 10 ran correctly. After that, I write A.jic file again, then auto configuration has done and my program ran correctly. And after that A.jic file writing has been always fine.

I have three boards, and I checked two boards ran correctly by this writing manner above, writing B.jic. And I still have one failed board, not writing B.jic.

I extracted program data from EPCQ-L by Examine function via Active serial port, and I found each pof-files in three boards, two fine and one fail, were exact same. So I believe program file in EPCQ-L and EPCQ-L itself should be fine.

It looks 10AX016C4 issue, but very strange symptom.

Does anyone have any idea?

Thanks,

Tetsuya