0xe0009578 - Unable to copy the virtual machine disk using the VMware VixDiskLib
I use BackupExec 2010 with VMWare agent to backup a vSphere 4 serverfarm. On three servers I get the error message 0xe0009578 - Unable to copy the virtual machine disk using the VMware VixDiskLib. The KB articel linked to this error message mentions that this error occours when the VM has virtual harddisks on different datastores. This does not apply to all three affected VMs. In particular, one VM has only one virtual harddisk. Nevertheless, I applyed the suggested hotfix 348284 (that superseeded the previous hotfix 344584). But the error is still there.
Any ideas? LiveUpdate says, installation is up to date.