Dell OME MIB Import Utility - error

Hi All,

I have been provided with a MIB file for some appliances we are running (ironically they use Dell hardware but we can't install OpenManage!)

When I use the MIB import tool, it throws the error "Invalid column name 'IsBuiltIn' " loads of times, once for each definition by the looks of it. 

I'm no expert at MIBs and I've had a quick look at the MIB file but cannot find this text within, is this an error with the MIB import tool?

Any help greatly appreciated.