The parallelfriendly THistSvc that I've introduced had a bug where a wrong and empty container is used in io_reinit() and updateFiles(). This resulted in failures during AthenaMP jobs. I fixed that by using the correct container (namely m_uids instead of m_uidsX) and introducing an additional loop over the internal vector to catch all possible clones of a given TObject.
Martin Errenst authored491a17ff