[Stromag]

Hello I have installed the basic package of Ista-P 3.63.0 and as far as all right.
But if I make the update to 3.63.1, I get an error message.
So if I do not edit the application.xml for the Loader V6.1F and leave the value distributionVersion = "63.0.400" and then do the update, I get the error "Unknown".
If I edit the application.xml for the Loader V6.1F to distributionVersion = "3.63.0.400" then I get the error "25000" which beasagt that the program Ista-P can not be found.
Ista -P is also not under "Programs and Features", for example, to uninstall it.
Can someone help me with the mistakes and say what the problem is?