Thank you Rene, these TPolyLine3D's are the data members of the track object (used for event display), so, to prevent deletion by gPad I had to reset the bits kMustCleanup and kCanDelete. Best regards, Ruben -- On Fri, 24 Oct 2003, Rene Brun wrote: > Hi Ruben, > > The low level primitives like lines, text, markers are by default > automatically deleted when clearing the canvas. TPolyLine3D used to be an > exception until a fix in February this year. > See the "Object Ownership" chapter in the Usrers Guide pade (in particular page > 100) > > In your example, you should remove the line > delete line; > > Rene Brun >
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