String index out of range: 0

I get a "String index out of range: 0.

I have a program where it checks the user name and password, then if all is true, that he puts the identification number of the user in a session called userID variable (session. User name) for some reason it goes on to say that the variable is not defined. Activate session inside a function variables or can within a component?

should be

CR

Tags: ColdFusion

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