After Month of machining without any problems -Positionerror and no more moving

Hi at all,

Yesterday, after many Month of working without any problem, my Mill stops with an error "Positionerror ...".
My config runs on Probe Basic with a MESA 7i96S and a7i85S (for the aditional linear-encoders)

I restartet Probe Basic, but every time I tried to reference, i allways got the same error and not just one axle moves.
Also I checked the voltages and all seems OK.
To find out if there ist just a basic funktion, i startet a new config with the wizard. 
After setting up the MESA 7i96s (IP 10.10.10.10), opend up the test-movement-mask, activating the axle, i tried to move the axle, but nothing. (The HAL-Scope shows a feedrate like it should do)
I Tried this for X, Y and Z but nothing!

So at this moment I`m wondering if there is a problem with the MESA Card.
Is there someone who had a similar issue and could give me a tip.
By the way, if I move the axles by hand, all the linear-Encoders at the 7i96S works fine.

Thanks a lot.
Jens