Thanks Markus,
but I've got the same runtime engine installed on both systems.
I developed and build (application builder) the executable and the installation software on my PC, which has Win2000 installed.
Then I took the installation software to the customers PC (WinXP) and installed it.
As I wanted to analyze his files (xml) on my PC, I got the error code 1108 on the vi "UnflattenFromXML".
I noticed that the numbers on the XP have commas, but on mine (Win2000) have dots as decimal point ...
Still no solution but I appreciate your help a lot!
Marco