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Yep. Dave Gerdes stepped into this one too. At least if I recognize the symptom. You specified the file in the File menu 'input file'? Wrongo. (though probably a good guess) You need to specify the input dataset as an argument to main when you fire up nld_win. Datacontrol does the *ascii* IO; you've told it to read back an ascii file - at least that's what it expects. We should probably disable that menu item. Richard "David L. Wagner, University of Colorado" wrote: > > Hi Richard, > > We have been using the program that runs isajet and creates xdr files (I > believe this is the same program that you guys are using to generate > isajet files at SLAC). > > We have been trying to read those files with nld_win to see what they look > like; we can open a file, but when we try to process an event, we always > get an error > > FATAL ERROR: > DataControl::read -- client' > > Have you seen this before? I think that the xdr files that we are > generating are real xdr files-- at least I can run ntuBrowser and it > claims that there are "events" in there, although it doesn't give any more > information than that. > > Thanks! > > -David > > -- > David Wagner > mailto:[log in to unmask] > http://hep-www.colorado.edu/~wagner/ > postal://USA/80309/CO/Boulder/Campus Box 390/David Wagner -- Richard Dubois SLD, Stanford Linear Accelerator Center [log in to unmask] http://www.slac.stanford.edu/~richard/ 650-926-3824 650-926-2923 (FAX)