Hello, I am having problems with running a threads program and was windering if someone could help. I have the following 3 files. 1) example.h class example{ public: example(); virtual ~example(); void operator()(); void someOtherFn(); }; 2) example.cc #include "example.h" C_example::C_example() { } C_example::~C_example() { } void C_example::operator()() { cout << "I'm thread\n"; } 3) main.cc #include <boost/thread/thread.hpp> #include "example.h" int main(int argc, char* argv[]) { example e; boost::thread t1(e); t1.join(); return 0; } I have compiled this and linked with: -lboost_thread-gcc-mt When I run it, I get the following error: terminate called after throwing an instance of 'boost::thread_resource_error' what(): boost::thread_resource_error Abort (core dumped) Any help please?