We faced with similar problem in past. Now it should be resolved. Could you provide as with following info: What does input parameter iparm(60) equal? How much number of threads (MKL_NUM_THREADS) do you use? Please, print out the iparm(57) and iparm(64) after reordering step.Additionally it would be nice if you set msglvl=1 before reordering and provide us with output information.