#20 Error importing images?

[Graeme Winter]

Looks like error reading images or similar...

3D II R pipeline (XDS IDXREF all images) selected
Process ID: 25850
Directory exists: /Users/[redact]/T32_020215/processing/Harvest
Created CCP4_SCR: /var/folders/qm/4x7ddqx6rn50n100yq88kr40000gp/T/tmpoGHbL5
Exception: unsupported operand type(s) for +: 'NoneType' and 'NoneType' (/Users/[redact]/T32_020215/images/image####.img)
Scaler reset