Need some suggestions for regaining an engine into the remote's index. while I was operating I had an engine's name disappear and only the channel number remain. I was getting the out of RF range message so thought maybe the battery needed a charge since it's only recently been back out after long storage. After charging and putting back on the track the remote didn't even list the channel assignment. Tried re-adding but only get an engine error message. Not sure where to go from here, all the other engines on track operate normally.
Thanks,
Scott