Art, Solaris 2.7 ships with /usr/dt/libXm.so.4 whereas 2.6.1 ships with libXm.so.3. It appears that something in the motif library has been changed which automatically generate an expose event in the display making the call in $GARPHOME/gui/maincb.c line 57 unnecessary- and for some reason in conflict. * Force a redraw */ WindowObjectResize( wo, canvas_width, canvas_height ); I commented out the above line and tested with your configuration and it appears to work. I will have to explore how this is handled on all of our platforms to see what else this might break- but you might want to try commenting out the above line and recompiling so that your project can make use of the feature. Steve Chiswell