Occurs when a variable is referenced in an expression, but is not defined in the VAR section. This error may also be returned if a variable references another variable that is not yet defined in the variable declaration list. For example:

VAR

{

V1 (%V2 + 'world')

V2 ('hello ')

}

V2 must be defined

prior

to V1 in order for the definition of V1 to be valid.