This has occured on several occasions now in r9. I have not been able to determine what triggers it but it occurs with all tools and in both 2d and 3d windows. rebuild, refresh, redraw, adjusting display options, tec.... Everything else seems to work fine but the rubber band line just does not display. I have to restart ArchiCAD to clear correct.
Hardware related possibly??
Dell Dimension 4600
dual monitors
Win XP SP2
pentium 4 - 3GHz
1 gig ram
David Bearss
Archicad 18/Windows 11
Alienware 17 R5
i7 2.4 GHz / 16 GB ram