>From the documentation: x 1!:12 y Indexed Write. x is the string to be written; y is a list of a boxed file name (or number) and a boxed index.
You don't need to give an index and a length - J knows the shape of things. Try something like a (1!:12) f;sg*60 Hope this helps. -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm