Originally posted by: SystemAdmin

[agus said:]

Hi,
I am trying to put the “next” function in the forall statement but I got an error message after I tried to run it.
Here is my code:

forall (i in Flights, u,v in i.nodes: u != last(i.nodes) && v == next(i.nodes,u))
t[i][v] - t[i][u]== 0;

I know I can put the “last” function in the forall statement, but I don’t understand why it won’t work with the “next” function.
Could someone help me?
Thanks
agus

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