JS Path control Script error

[Joe_T]

Hi all, I am wonderingif someone could help me with the above rule. I keep getting the same script error which is below.

I get this script error in both 2009 and 2010 and on the same route, the route is the SNC Sipton to Carlisle route which has been modernised to 1990 standards and I am trying to create a session and obviously with Carlisle being such a big station I need to be able to have something like path rule to be able to set the path for me. Thanks in advance for any help given

 

[Joe_T]

Got the first problem sorted, I was going into driver from surveyor. Now another one, this time there is about 3 or 4 trains using the setpath rule and go through fine then another one comes along and its the same train and I get the following error: