Problem
During uninstall of SmartPlant Foundation, after having already uninstalled Schema Component, the following error is displayed:
Error 1905. Module C:\Program Files (x86)\SmartPlant\Foundation\COMPlus Applications\SPFSCWrapperComPlus\SPFSCWrapperComPlus\Schemacomponent.tlb failed to unregister. HRESULT -2147319780. Contact your support personnel.
Solution
When SmartPlant Foundation and Schema Component are installed together on the same machine, you must always uninstall SmartPlant Foundation before uninstalling Schema Component.