I can probably assume that you downloaded the demo. Did you have the same problem with it? If not, it's DEFINITELY a script-conflict problem. Been running into a number of these. Weird as it seems, last time there was a problem, it came from fukuyama's caterpillar system (for whatever reason I dunno) which is weird as I've used it too.
Sometimes, the placement of scripts affects their usage. If you placed RTAB (and it's related scripts) BELOW your other custom scripts, try placing 'em ABOVE these custom scripts. Point of fact, all RTAB add-on script HAVE to be placed below RTAB for them to work.