I need help creating two workbenches that convert DGN to a GDB, and separately a DWG to GDB?

I have a huge workbench someone previous to my role has created, but it doesn't seem to work for all of the data. It is set to create a spreadsheet to show those that didn't work.

Can anyone shed any light? I feel starting back to basics is better than tackling the giant workbench I already have, it's too confusing for me to crack, and it is sensitive information so I'm unable to share it.