Hello, I am using root4 on a debian linux machine. The computer department recently upgraded from root 3.10 to root 4.00/08. when I try to compile code c++ code I wrote with root objects in it I get these type of error. It does compile, but crashes on linking I think g++ -g -O -Wall -fPIC -pthread -I/soft/intel/root4/include/root -I../Hira-Class/ -c evt2root.cpp g++ -O evt2root.o -L/soft/intel/root4/lib/root -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -pthread -lm -ldl -rdynamic -L../Hira-Class/ -lCRootEvent -o evt2root evt2root.o(.text+0x3f8): In function `LHira::LHira(void)': /user/hiratest/mark/working/root-unpackers/just-hira/evt2root.cpp:76: undefined reference to `TStorage::ObjectAlloc(unsigned int)' evt2root.o(.text+0x412):/user/hiratest/mark/working/root-unpackers/just-hira/evt2root.cpp:76: undefined reference to `TRandom::TRandom(unsigned int)' evt2root.o(.text+0x43e):/user/hiratest/mark/working/root-unpackers/just-hira/evt2root.cpp:76: undefined reference to `TObject::operator delete(void *)' evt2root.o(.text+0x44e):/user/hiratest/mark/working/root-unpackers/just-hira/evt2root.cpp:76: undefined reference to `TStorage::ObjectAlloc(unsigned int)' evt2root.o(.text+0x477):/user/hiratest/mark/working/root-unpackers/just-hira/evt2root.cpp:76: undefined reference to `TFile::TFile(char const *, char const *, char const *, int)' I changed the .rootrc and .root.mimes files for root4 and changed my LD_LIBRARY_PATH for the changes. Am I forgetting another change? Thanks for the help Mark
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