Okay, good news.
I initially ran my testscript in ISN AutoItStudio which gave me the error message.
Then, I tried it from the scite editor and from there it runs without errors.
So, it has something to do with ISN. (running in 32bit ?)
Also, I found oleview in the windows 10 SDK, thanks for that.
It does complain about the viewer not being registered.
Thanks again,
Christian