Duplicate Car Numbers Options

[AT RR]

Steve,

I need your help. I just recieved an email

"Have you had any problems with duplicate Car numbers on your Template. I am experiencing this problem on my workorders."

(This is the NYC West Shore template).

I have not seen this problem in all the switch lists I have run, do you know what would cause this so I can help the preson that dowloaded the template? 

I asked but don't have an answer on his car and world fill settings.

Thanks,

Peter