VALUE ERROR 6

This report is given when either:

• There is no active definition for a name encountered in an expression.
• A function does not return a result in a context where a result is required.

Examples

     X
VALUE ERROR
     X
     ^

     ∇ HELLO
[1]    'HI THERE'
[2]  ∇

     2+HELLO
HI THERE
VALUE ERROR
     2+HELLO
      ^