Variable required

Possible causes:

         You have attempted to use a numeric expression as an argument to the LenLANLEN function.  The Len function does not accept a numeric expression, but it does accept either a string or numeric variable or a string expression.

         You have used a function call  or an expression as an argument to InputVFOKL9, LetLANLET, GetLANGET, or PutLANPUT.  For example, you've used an argument that appears to be a valid reference to an array variable, but instead is a call to a function of the same name.  These statements do not accept function calls as arguments.