Folks, There are two bugs in src/XrdXr/XrdXrClient.cc that causes xrclient to dump core if you run the logout command. The client->logout() call deletes worker but does not set it to 0. Then when client is deleted, it unconditionally deletes the worker again. The simple fixes are 1. in the method XrdXrClient::logout() if (rc == 0) { delete worker; //ADD THE NEXT LINE worker = 0; TRACE(Logout, "logout ok."); } 2. in the destructor ~XrdXrClient() change the "delete worker" to if (worker) { delete worker; } One might argue for a review of the logout code deleting the worker, but these changes stop the core dumps. -- Gregory J. Sharp email: [log in to unmask] Wilson Synchrotron Laboratory url: http://www.lepp.cornell.edu/~gregor Dryden Rd ph: +1 607 255 4882 Ithaca, NY 14853 fax: +1 607 255 8062