This is a free-text description field (rmtErrDescr) on a MountInstFsm object, holding whatever descriptive text was set for the finite-state-machine (FSM) task UCS Manager runs while it mounts, unmounts, or validates that NFS mount. An admin uses it to record human-readable context about that specific MountInstFsm instance so its purpose is clear without having to infer it from IDs alone. For example, an admin auditing MountInstFsm objects would read this field to see the notes attached to one particular instance rather than a generic label shared by all of them.