Suggestion for EXECON.

[John P]

I was just playing with EXECON and found that if you have for ex. two lists l1:={1,2,3}, l2:={a,5,6} and if you do EXECON("&1-&2",l1,l2) I get the "Error:Syntax Error". I think because l2 has symbolic element in it and because l2 is accessed element by element using "&2". If there are no symbolic elements in l2 then there is no error and no problems. When I do for ex. sum(EXECON("abs(&1*l2)",l1,l2)) also there is no error even though l2 has symbolic element(s). My conclusion is that: the error occurs only when "&" finds in a list(s) symbolic element(s) ex. 'a', 'a*b' etc.. I do not know if it is at all possible to fix that and make EXECON to work when "&" also accesses list(s) with symbolic element(s) then, I think, the EXECON would be more versatile.