MTS or COM+ objects were not upgraded
The project that you are attempting to upgrade has a reference to the COM+ Services Type Library (Comsvcs.dll) that cannot be upgraded. In Visual Basic 6.0, this library was used to access Microsoft Transaction Services (MTS). In Visual Basic .NET, MTS is replaced by transaction processing functionality in the .NET Framework.
What to do next
- Because of differences in the transaction processing models, existing code will need to be deleted and replaced by code that uses .NET transaction processing.