Running program from Home or Program menu

[pinkman]

Hi,
I’m a bit puzzled by this behavior, I think I’m doing something wrong but I don’t know what.

I created this fabulous program to find the next prime number:

Code:


EXPORT PRIMTST(NNN)
BEGIN
 LOCAL NN;
 NN:=NNN;
 REPEAT
  NN:=NN+1;
 UNTIL CAS.isprime(NN);
 RETURN NN;
END;

Two types of execution, two results:
- Home: ok
- Program menu: error
- Debug: it halts with error on line NN:=NN+1

Notice: when replacing isprime(NN) with NN>20 it works without any error.

Can someone explain?
Thanks,
Thibault