we found that when we press "Alt + double click" in the OpenGL part we get an error:
Best regards,domain error: argument not in valid range
while executing
"expr double( $dif_x) / double( $dif_y)"
(procedure "GetDynamicEightDirectionsPosition" line 36)
invoked from within
"GetDynamicEightDirectionsPosition $W $x $y"
(procedure "Togl_Alt-ButtonRelease-1" line 3)
invoked from within
"Togl_Alt-ButtonRelease-1 .gid.central.s 882 477"
(command bound to event)
Javier