Something that has been plaguing me for a while is that the masks are hardwired into the Gismo code. I have now got a new version of them which allows them to be specified in the geometry .ini file. I will update the unix version of Mask.cxx today sometime and also my Strawman .ini files. It's probably easiest to send out the single file as a patch. Of course, I'll need to remake our Gismo distribution and update the web .ini file versions. Richard -- Richard Dubois SLD, Stanford Linear Accelerator Center [log in to unmask] http://www.slac.stanford.edu/~richard/ 650-926-3824 650-926-2923 (FAX)