I think it might be a know issue. I used to have it. What I can tell you is that it has nothing to do with the parameters. I did not have any of those. I can recall how it cleared. Somehow I would pause a moment and try again and finally it would connmect.
When I have seen this error previously then it was always due to a file permission problem.
But I think in your situation it’s a different problem. You specify in your startup parameters that your temppath is H:\navision, but still you are told that it cannot create the file in: C:\Users\USERNAME\AppData\local\Temp.
I would try the temppath without the last back slash.
Stefan, I am watching this thread with interest as we have the exact same problem. We are running Citrix Xenapp Server with Windows 2008 x86 using the Navision 2009 Classic interface. The application runs fine on the Citrix Server desktop but not as a published application or even under the desktop when run as a virutal instance.
The error we get is “The file C:\Users%username%\AppData\LocalzTemp\1_TEMP_XXXXXXXXXXXXXX.tmp already exists”