No doubt part of the problem of incompatible structures is due to the fact that int's on PDP'11 are 16 bits and 32 bits on VAXes. If you have no need for a int to be greater than 32767 then use short. John A. Ebersold World Video Library (not a video store) ihnp4!convex!ctvax!trsvax!doc!wvlpdp!john 2747 Airport Freeway Fort Worth, Texas 76111