troubleshooting Question

System.InvalidCastException: QueryInterface for interface

Avatar of Michel Sakr
Michel SakrFlag for Canada asked on
Web Components.NET Programming
3 Comments1 Solution2014 ViewsLast Modified:
I have a managed code that is calling unmanaged Com+ vb6 code , I always get this error for 1 component , other are working ok:
This component used to work ok..
One fact is that this is a webfarm cluster on several machines we are having the same problem
I traced the error on the web and it says (the closest) that this error might be due to threading conflicts (the unmanaged component is running in single app mode) but I repeat this used to work!

any clues?
Michel Sakr
Rounded IT Consultant / Projects manager / Cloud Consultant / IT Planning

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