When you want to migrate your requirements, test cases, defects and other data from HP ALM to SpiraTeam, you will need to make sure you have all of the HP ALM client components installed.
When you try and connect to HP ALM 11 using the Spira Importer for HP QC 9.0+ you may receive the following error message:
System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {C5CBD7B2-490C-45F5-8C40-B8C3D108E6D7} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
This article describes the steps necessary to resolve this issue.