I know next to nothing about Okuma lathes with Okuma controls, but this much I know....always rename the A1.MIN file so that A1.MIN is available for loading the next program. We only have one Okuma...that I inherited when the other lathe programmer quit. I know people like Okuma controls, but I find them a pain since Fanuc controls are on almost every other lathe we have. Renaming a file on the Okuma isn't hard, but not nearly as easy as on a Fanuc.