Arria 10 DDR4 SODIMM calibration fails occasionally. How to remove this bug?

Thank you for reply.

We running user logicat quarter rate (225 MHz)

Yes we know about EMIF Debug Toolkit .

At the moment when the bank is not calibrated, we see deviations along some lines.

But when the bank starts to calibrate after a series of Reset signals, then we see that everything is normal.

This situation occurs randomly.

At first we will try decrease memory frequency and use half rate at user logic

Best Regards

Igor