I'm not an expert on the front panel data logging, so I'm not exactly sure what's the best solution. It sounds like the VI has a reference to the front panel datalogging file that you were using, and it's unable to load this datalog file. I'm surprised that this is a fatal error.
You should first ensure that you actually have this datalog file. It probably either needs to be in the same place relative to the VI as on the old system, or it might have to be installed in exactly the same directory as the old system. You might try both.
I suppose it could also be that the datalog file is present, but somehow got corrupted. You could also try removing the datalog file, and see if the VI will load successfully without it.
Sorry I can't be of more help. Y
ou may end up having to post your VIs and datalog files.
Brian