Saved project not loading


I am using V3 on a iMac7 and I am having trouble loading any saved project (although I get the message project saved successfully before quitting the program).

In the terminal I get the following message:

`ccpnmodel.ccpncore.memops.ApiError.ApiError: Cannot add child - key already in use: ccp.nmr.Nmr.Shift:<ccp.nmr.Nmr.ShiftList [`default`, 1]>:None`

Also exporting to NEF file does not work all the time.