When QMM Agents are installed on the cluster server having more than two nodes, the following error appears in the EMWMigration.log file:
aeEMWGUIShared::aeEMWGUIShared::modMain::GetComputerOSVersion Error: 91 - Object variable or With block variable not set (Server: VS_NAME)
Description: Object variable or With block variable not set
aeEMWGUIForms::frmMailJobWizard::CheckAgentsOnServers Error: (Cannot check OS version.)
QMM Project Manager checks the Operation System version when installing any QMM for Exchange agent on the clustered server. The OS version cannot be obtained from the virtual server, therefore, QMM Project Manager tries to get the OS version from the active node.
If the current active node of the cluster is not added to the cluster group preferred owners (Cluster Group Properties | General | Preferred owners), QMM Project Manager cannot get the OS version and shows the error described above.
To resolve the issue, add all cluster nodes to the Preferred owners of the cluster group where QMM resources are located and repeat an attempt to install the agents on the server.
This issue is planned to be fixed in the next releases of QMM with the change request assigned CR0234187.