Hi Jochen, you should try to open such files with TRFIOFile instead of TFile! Regards, Horst Jochen Schieck wrote: > > Hello, > > we are trying to acces root files in CASTOR with > > TFile *f1 = > TFile::Open("rfio:/castor/cern.ch/user/s/schieck/mc2790_1_111.root"); > > and the system complains with: > > Error in <TRFIOFile::TRFIOFile>: file > /castor/cern.ch/user/s/schieck/mc2790_1_111.root does not exist > > But the file exists as you can see: > > [lxplus044] ~ > rfstat /castor/cern.ch/user/s/schieck/mc2790_1_111.root > Device : 0 > Inode number : 4236991 > Protection : -rw-r--r-- (100644) > Hard Links : 1 > Uid : 19235 (schieck) > Gid : 1135 (ws) > Size (bytes) : 126547074 > Last access : Thu Nov 29 12:15:50 2001 > Last modify : Thu Nov 29 12:00:40 2001 > Last stat. mod. : Thu Nov 29 12:00:40 2001 > > We tried a similar thing in PAW with opening a hbook file in CASTOR and it > actually worked! > > We managed to access the file with manual stagein -M and using a symbolic > link. However, if we try to access a tree within the root file via > > TFile *f = TFile::Open("rfio:link.root"); > TTree *ntuple = f.Get("h10"); > ntuple->StartViewer(); > > and try to plot a variable in a TBranch ROOT crashes. > > We use root ver 3.01 from afs > > ROOTSYS=/afs/cern.ch/na49/library.4/ROOT/new/i386_redhat60/root > LD_LIBRARY_PATH=/afs/cern.ch/na49/library.4/ROOT/new/i386_redhat60/root/lib/ > > on lxplus. > > Thanks for any help > > Jochen > > ---------------------------------------------------------------------- > Jochen Schieck > EMAIL: schieck@mppmu.mpg.de > Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) > Tel: +49 89 323 54 352 > +49 179 54 72 113 > Fax: +49 89 322 67 04 > Foehringer Ring 6 / Room 245 > 80805 Muenchen > ---------------------------------------------------------------------- -- ----------------------------------------------------------------- Dr. Horst Goeringer email: H.Goeringer@gsi.de GSI Computing Center Tel: +49-6159-71-2553 Planckstr. 1 Fax: +49-6159-71-2986 D-64291 Darmstadt, Germany -----------------------------------------------------------------
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