I am having the same problem with running colecovision games.
I have tried for many days loading, unloading reading many guides with the same results.
I am getting close though. Games start to load then a quick dos screen appears and disappears quickly I was able to grab a screen shot.
See image.
It says: 313 10031-4005 73108a.u2 NOT FOUND (tried in coleco coleco)
Fatal error: Required files are missing. the machine cannot be run.
What files is it missing? I have the coleco.rom and coleco.zip in the Roms directory with the zipped game files.
Since I cannot see the 4 images SpyCat posted (must have been removed), I cannot know where to put the files or how to name them.
I am using LaunchBox 4.5 and Mame191b and followed Unbroken Software's tutorial published Jan 13, 2017
Any ideas?