Step 1 works as expected, maps are erased (have sent locked maps and they go poof!)
Step 2 does not work. Drag and drop and nothing appears in the window. tried add maps and nothing appears in the window. I can add maps from the uncompiled folder, but have tried making gmapsupp all caps, or lower case nochange. tied changing map name no change. Tried moving to different directory, no change.
Step 3 no problems
step 4 works if there is a map showing in window from step 2 . Have been able to send locked to GPS to verify maps are on GPS and to verify step 1 works.

I was hoping you could tell me why I am having trouble with step 2 with the gmapsupp.img file and Sendmap20.