Problem

When TermImport fails to import tbx into a pre-existing TermCollection, TermCollection's status is being set to 'error' which makes it unusable anymore for any further MatchAnalysis. Also, TermImport failure is somewhy not logged neither in System log, nor in Language Resources log.

Solution

Prevent setting status 'error' for pre-existing TermCollection if TermImport fails. Make sure TermImport error is shown in LanguageResource log for the target TermCollection. Make sure log tells user to inspect termCollection, if failed import did mess up something.