Error "Cannot install Shared components on server 'SERVERNAME' due to errors" (4311697)

Shared components cannot be installed and errors in the EMWMigration.log file show lines similar to the following:

29/06/2010 03:20:29 PM aeEMWGUIWizards::CInstaller::GetResultCodeFromSetupLog Code: -12
29/06/2010 03:20:29 PM EMWCon::CModMisc::MsgBoxEx Cannot install Shared components on server SERVERNAME due to errors. Install Shared components manually on server SERVERNAME in the 'QMMEX$SERVERNAME$' shared folder.
29/06/2010 03:21:12 PM aeEMWGUIWizards::CAgentInstaller::m_internalInstaller_OnComplete Error: (Install completed unsuccessfully. Agent: Shared Components Server: SERVERNAME)