debugger shows
runtime Error 429
knowledge base says:
Error 429 typically occurs when code tries to instantiate an object. This error can be caused in many ways. The following list includes some of the most common scenarios that could cause this error:
License information for a particular component is not present.
A component is missing or is not registered.

A DCOM issue exists.
A Packaging and Deployment Wizard (PDW) issue exists.
fixed bij reinstall ttd