Hello Bill, The basket size is automatically extended to accomodate at least one entry. I don't think there is a problem there. The first thing to check is to read your Trees(s) using the standard Root browser. If you have only TClonesArrays, you should be able to inspect all your attributes with the standard Root without your classes. If this works, you should then suspect a possible error in the way you set your branch addresses in the reading program. Let me know when you have a (small) file with problems, I will investigate. Rene Brun William Love wrote: > > Root gurus > > I am using Root 2.23/09 and writing a TTree with three > TClonesArrays, Tracks, Hits, and Pixels. Recently I > suffer unreproducable troubles with root output files. > Though the tree is well behaved while I am running > the writing program, if I close the file and exit and then > reopen the file I am often stuck with a segmentation > fault in trying to look at the TTree, sometimes accompanied > by a message about insufficient memory. > Victor (Perevoztchikov) says he remembers a rootalk > dialog about buffer (basket) size problems. My events > have usually about 16000 Hits, which means members > would come near the 64 Kbytes basket size. Does root > maybe have a problem when variables just overflow a > basket? > I would love to send an example script but I have had > runs of 200 events that work fine and runs of 5 events > that produced an unusable root file. Its frustrating. > Any information or advice would be appreciated. > Thanks > Bill Love
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