Opened greyscale image in Gimp.
Chose Layer>Liquid Rescale.
Chose New button in the Feature Discard Layer group.
Got this error message:
Calling error for procedure 'gimp-image-add-layer':
Image 'file:///home/bootch/LeefersFarmArt/Trial.pnm' (1) is of type 'gray', but an image of type 'rgb' is expected
I'm trying to dissappear (or remove or discard) an object.
I understand that this is not a high priority (greyscale a small portion of use) ( I can probably work around it) and that maybe it is a known limitation.
I searched for RGB in the tutorial and the manual but found no mention that discarding only works for color images.
It must be related to the need for a color (red) highlight for the selection to discard.