Error converting to GrayScale




I’m trying to convert a four channel .TIF file from Colour to Gray and keep getting the following error message:

Error while processing ColorToGray:
index 3 is out of bounds for axis 2 with size 3
Do you want to stop processing?

Any ideas how I can resolve this issue. I would put the information from the command window but since installing CellProfiler 3.1.5. this no longer appears (if anyone could also tell me how to get this back that would be much appreciated).



Can you upload the pipeline and image?