iSight not reading Abaqus .odb

I am running an optimisation using a parameterised Abaqus model. The Abaqus component editor picks up the parameters from the input file fine, but there are no results when I read the .odb file. I have checked the file in CAE and the results I need are in it. I was running a very similar model before with no issues, but I made a small change and now I cannot extract the results. Has anyone else had a similar problem and know how to resolve this?