Sorry, I forgot to include exactly what I'm seeing when I compile and run this. Here ya go: topher@tophtop 18:05$ make g++ -g -Wall -fPIC -D_REENTRANT -I/usr/local/root/include -c exampleTree.cxx g++ -g -Wall -fPIC -D_REENTRANT -I/usr/local/root/include -c CCABit.cxx rootcint -f CCABitDict.cxx -c CCABit.h g++ -g -Wall -fPIC -D_REENTRANT -I/usr/local/root/include -c CCABitDict.cxx g++ -shared -g CCABit.o CCABitDict.o -L/usr/local/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lpthread -lm -ldl -rdynamic -o libCCABit.so g++ -g exampleTree.o libCCABit.so -L/usr/local/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lpthread -lm -ldl -rdynamic -o exampleTree rm CCABitDict.cxx topher@tophtop 18:05$ gdb exampleTree GNU gdb 5.3-22mdk (Mandrake Linux) ... (gdb) run Starting program: /home/topher/root/simpleTree/exampleTree [New Thread 16384 (LWP 8020)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 16384 (LWP 8020)] 0x405e8041 in G__ClassInfo::RootFlag() () from /usr/local/root/lib/libCint.so Current language: auto; currently c (gdb) where #0 0x405e8041 in G__ClassInfo::RootFlag() () from /usr/local/root/lib/libCint.so #1 0x40caaa6c in __JCR_LIST__ () from /usr/local/root/lib/libTree.so #2 0x40c1da8b in TTree::Branch(char const*, char const*, void*, int, int) () from /usr/local/root/lib/libTree.so #3 0x08048dc5 in main (argc=1, argv=0xbffff514) at exampleTree.cxx:36 #4 0x40f077f7 in __libc_start_main () from /lib/i686/libc.so.6 (gdb) l 36 31 // Create a ROOT Tree 32 TTree *tree = new TTree("T","An example of a ROOT tree"); 33 34 tree->Branch("event", &myevent.x, "x/F:y"); // this works fine 35 // tree->Branch("CCABitArray", &ccaa); // !!GIVES ME A SEGMENTATION VIOLATION!! 36 tree->Branch("CCABitArray", "TClonesArray", &ccaa); // same thing 37 // tree->Branch(&ccaa); // doesn't work either 38 int nev; 39 40 // Fill event with some random numbers (gdb) This may help. - Topher
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