BUG[?]: ΣLIST, ΠLIST with verrrry short lists

[StephenG1CMZ]

One can use invalid dimension, but the way I was thinking, anyone calling Summation expects a number - or if that cannot be produced, whether because of an index issue or an overflow, a NaN.

(I have never summed rather than concatenated strings, so I am presuming a numeric result...so that might be inappropriate for non-numeric summations).

Of course, unless one can detect the error and continue, it makes little practical difference - and makes simply returning 0 seem preferable.

One question: if one do do a summation of strings, can one also do a product of strings?!
Merry Xmas all.