There is strict reason why I posted screenshot:
1. As part of a program, the failure is in just 2 devices from 50 different;
2. The same code works with some different dates on the problematic devices and this is confusing;
3. Line 674, 675 and 676 are debug lines, at log window is clearly seen the result (that's why I posted screenshot);
4. As seen on the right part, the log shows that everything is OK, but it is not.
I will replace "DD" with "dd" and let you know. The testing takes a lot of time, because the Hardware is in Russia, development in Bulgaria.
Thank for the paitience.