2.1 Color-To-Gray fails on 4 channel images

Hi guys,
Color-To-Gray is freaking out when I ask it to separate a 4 channel image (it is actually 4 channels, I checked in FIJI to make sure in case I’d accidentally lopped one off along the way). It’s fine only pulling 3 channels, which makes sense given the following error. Thanks!

Traceback (most recent call last):
File “cellprofiler\gui\pipelinecontroller.pyc”, line 2615, in do_step
File “cellprofiler\modules\colortogray.pyc”, line 317, in run
File “cellprofiler\modules\colortogray.pyc”, line 363, in run_split
IndexError: invalid index

Would you mind posting the 4-channel image and the accompanying pipeline? Thanks!

Attached. Thanks for the help!
Find4ColorNuclei_2_1.cpproj (356 KB)

Hi Beth,

OK, I’ve replicated the issue. It’s definitely a bug which I’ve reported here. In the meantime, do you have the option of exporting this image as 4 individual files, one for each channel?

Hi Mark,
I definitely could do that; in the meantime I’ve still got builds of 2.0 and 2.1 on my system, and I’ll just keep using 2.0 for that part of my analysis. Thanks!

This issue has been resolved with the 2.1.1 release.