Loose the axes

[TINO]

I have know a new problem with a other WV robot model G120 with VRS1-A release 1.13h2.

The problem is: I loose the axes normalize.

When I switch on the robot I get a message to normalize the axe 2, after 4 and 5. When I normalize the axes the robot works perfectly, but if I switch off and switch again I have loosen the normalization for the same axes. Sometimes I must normalize the axe 3 also, but never 1 or 6.

Can you give a idea when I can looking for? Could be battery problems, although looks good?

Thanks in advance