[ Charles W., on Linux ] >> >>> a = Numeric.array((0,0)) >> >>> a**2 >> Traceback (innermost last): >> File "<stdin>", line 1, in ? >> OverflowError: math range error [ David A., on Windows ] >Strange -- it's not a problem for me: It blows up for me also, on Linux, but not on Solaris or HP-UX. Strangely, a*a is not a problem. It will be investigated. Lee Busby