<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:18pt"><div style="RIGHT: auto">hi</div> <div style="RIGHT: auto">Dear gate users</div> <div style="RIGHT: auto"> </div> <div style="RIGHT: auto">i wont to defind the material and the application output is:</div> <div style="RIGHT: auto"> </div> <div style="RIGHT: auto">Idle> /gate/geometry/setMaterialDatabase MyMaterialDatabase.db</div> <div style="RIGHT: auto">-------- EEEE ------- G4Exception-START -------- EEEE -------<BR>*** G4Exception : GateMDBFile<BR> issued by : GateMDBFile::GateMDBFile<BR>Could not find material database file 'MyMaterialDatabase.db'<BR>*** Fatal Exception *** core dump ***<BR>-------- EEEE -------- G4Exception-END --------- EEEE -------</div> <div style="RIGHT: auto"><BR style="RIGHT: auto">*** G4Exception: Aborting execution ***<BR>Aborted (core dumped)<BR> thank you<VAR id=yui-ie-cursor></VAR></div></div></body></html>