I done the specific work... I apologize for disappearing - it had to be finished urgently.
But I did not solve the problem. For a given job, with the same settings, same drive surface ... there were different results. Three times it was calculated incorrectly, the fourth time in the right direction. And it's not the first time. This problem occurs every time I try to use 5Xtra. There are no problems with other strategies. Not 3X, not 4X, not 5X. But they are not always enough. That's why I thought to ask, maybe someone else has encountered a similar problem. I don't understand where to look anymore. Everything that came to mind has been tried.