<html> <head> <style> .hmmessage P { margin:0px; padding:0px } body.hmmessage { font-size: 10pt; font-family:Verdana } </style> </head> <body class='hmmessage'> Dear all, I am trying to use NCAT phantom on CTscanner. But during the simulation, this error consistently and continuously occurs:   Error: one of the matrix dimensions is zero! ERROR - G4Box()::G4Box(): coiso_S         Dimensions too small ! - 0, 0, 0 *** G4Exception : InvalidSetup       issued by : G4Box::G4Box() Invalid dimensions. Too small. *** Fatal Exception *** core dump *** Everyone knows what this means?? This is the .h33 file beginning : !INTERFILE := !imaging modality := nucmed !originating system := (X)MedCon !version of keys := 3.3 date of keys := 1996:09:24 conversion program := (X)MedCon program author := Erik Nolf program version := 0.10.4 program date := 2008:03:16 ; !GENERAL DATA := original institution := UZGENT !data offset in bytes := 0 !name of data file := interfile-Us-16_1.i33 patient name := Unknown !patient ID := Unknown patient dob := 0000:00:00 patient sex := Unknown !study ID := Unknown exam type := Unknown data compression := none data encode := none organ := Unknown isotope := Unknown dose := 0 NUD/Patient Weight [kg] := 0.00 NUD/imaging modality := NM NUD/activity := 0 NUD/activity start time := 00:00:00 NUD/isotope half life [hours] := 0.000000 ; !GENERAL IMAGE DATA := !type of data := Static !total number of images := 57 study date := 0000:00:00 study time := 00:00:00 imagedata byte order := LITTLEENDIAN process label := Unknown ; number of energy windows := 1 ; energy window [1] := energy window lower level [1] := energy window upper level [1] := flood corrected := N decay corrected := N ; !STATIC STUDY (General) := number of images/energy window := 57 ; !Static Study (each frame) := !image number := 1 !matrix size [1] := 256 !matrix size [2] := 256 !number format := unsigned integer !number of bytes per pixel := 2 scaling factor (mm/pixel) [1] := +1.000000e+000 scaling factor (mm/pixel) [2] := +1.000000e+000 image duration (sec) := 0.000000e+000 image start time := 00:00:00 label := Unknown !maximum pixel count := +6.519000e+004 !minimum pixel count := +0.000000e+000 total counts := 0 Thank you for attention,Best regardsCatarina Duarte <hr />Obtenha 30 Emoticons gr�tis para o seu Windows Live Messenger <a href='http://get.live.com' target='_new'>Clica aqui!</a></body> </html>