[phenixbb] Rosetta MR mmcif file subprocess failed

Hi phenix developers, I started a Rosetta MR run with a model pdb and the target sequence file. It seems that the initial MR run went fine and the Rebuilding Job for the best MR solution started. A sequence alignment is shown in the log file and than the job stops suddenly with the message Sorry: mmcif file must contain at least one data block. I can't even find a mmcif file in one of the folders. Any idea what might went wrong. Thanks in advance for your help. Christian