Invert does not work on Image Container

[tchitty]

I took 30 images of comet 41P, and want to invert them. I added all images to an Image Container, set the directories, and tried to open the process Invert. I get a pop-up that says: Cannot execute instance in the global context. Reason: Invert instances cannot be executed in the global context.

Did I do something incorrect in the setup, or is this expected behavior?

Thanks,
TomC

[oldwexi]

Instead of using the Invert process which has no GUI, i use
 in such cases PixelMath.

The simple expression in PixelMath :
~$T

Gerald
P.S.:
But it works with me when i drag the invert process from history explorer
to the workspace.
Dragging than the triangle from the image container over the invert process icon on the workspace
should do the same as the above solution.

[tchitty]

That worked! Thanks so much for the help!

TomC