string - or function
In a code, the coding for the expression handling was wrong and produced a surprising result.
I reduced it to an interaction between "x()" [inside Variables (x(:column))] and a variable x.
an example:
x= "hello";
type(x); // -> string
X(5) // -> "hello"
After defining a variable x, I can use it as a function x(...) - with an arbitrary argument
... and JMP will return the content of x.
someho...