When I worked with one application I encountered with error "Info 1912. Could not unregister type library for file [path to the dll file]. Contact your support personnel".
The reason was: TypeLib from this library was registered by TypeLib table.
Solution: All typeLibs from this library should be register by Registry Table
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Check that the typelib file isn't "in-use".
Answered 07/17/2008 by: AngelD
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I checked - and this dll was not used by another process
Answered 07/18/2008 by: Leobt
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Did a verbose log give you any more clues?
Answered 07/18/2008 by: AngelD
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The verbose log file contains only this error message and deinstallation of this package completed successfully. But typeLib stays in the system's registry.
I don't know way, but when typeLib was moved from the TypeLib table to the Registry table, it was deleted from the system's registry successfully during deinstallation.
Answered 07/21/2008 by: Leobt
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Then why not add the registration info through the Registry table instead then.
Answered 07/21/2008 by: AngelD
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