Thanks, I was afraid of that. As I have several of these files to write, I extended the VI to take in a requested precision, exponent width, and total width, similar to the LV built-in number-to-exp-string function. It returns the string and the length of the string(which will overun the requested width if required to meet the requested precision). It's attached in case anyone else is looking to do the same thing. Thanks for you help!