Hi Brandon, the attached files provide a simple program for concatenating SIO files. Example: [tonyj@dhcp-245 siocat]$ setenv CLASSPATH .:/home/tonyj/jas3-0.7.7/extensions/freehep-hep.jar [tonyj@dhcp-245 siocat]$ javac SIOCat.java [tonyj@dhcp-245 siocat]$ java SIOCat SIOCat: an application to concatenate similarly named, sequentially numbered input sio files. Usage: >> java SIOCat rootFileName firstFileNumber lastFileNumber outputFileName Where: rootFileName is common to all the files, firstFileNumber is the starting numbered file, lastFileNumber is the ending numbered file, outputFileName is the resulting concatenated file name. e.g. >> java SIOCat ZZ-SD- 1 50 ZZ-SD-Concat.sio will combine the files ZZ-SD-1.sio through ZZ-SD-50.sio into ZZ-SD-Concat.sio As an option, one can randomly add in events from a "signal" file via: >> java SIOCat rFN fFn lFN oFN signalFileName probability in which case events from the signal file will be randomly added with the given probability. On Fri, 2004-09-03 at 09:05, Brandon Drummond wrote: > Hello, > I have quite a few sio files (in the 100s) that I would like to run > over as a single job. Is there a way to concatenate the files into a > single large sio file or perhaps a way to keep loading a new sio file > during runtime within my jas job? > > Thanks, > Brandon >