I am using DTC for one year by now. I see some errors during software deployment which "do not make sence" - or I cannot understand why they happen:

Errors like:

Unknown Error. Code : ....

A fatal error occurred during installation

The strange thing is:

1.) These errors do not happen to all clients! I deploy new SW to about 70 PCs (I have tested the deployment before!) and maybe 2-3 random clients get errors!

2.) After one or two retries the SW gets installed successfully, at least most of the times. So these errors are also temporary and not comprehensible.

Can you tell in general why these errors can happen?