when do you define this nract variable ? maybe you use a different program to launch your app in the local environment

>Hi,
>I have an app which run in multi-user envir.
>When I tested on local its fine, but when I put on server I have one error with :
>"
>nract variable not found
>line of program 0
>no of error 12
>"
>
>Please help me, I dont know what to do
>
>Dorin