Hello ErnieM

Thank you for help
With the first 1000 boards two years ago i have not receive back one board with this problem.
For 3 months i have make 220 same boards, same software and now received
back from coustomer 6 unit with this problems. I have order a few Pic's now to test with this new order serie. I will hope, it helps, than i have no more ideas what can be that. In this moment i think that it is the Pic. I post feedback when i receive the news pic's

Best regards
Pedro