OMG

The Error OMG-URFD.mtf is a unit produced when a build table entry or hangar or bay unit cannot be found.

If the error is server-side (bad entry on a build table, missing file from unit files), there will be no fixing the unit. If the error is client-side (usually a missing unit file), the tooltip on the unit will say what it should have been, and will help troubleshoot the issue by pointing to what file is bad/missing.