MRCCSD task recognized as single-reference CCSD sometimes

Dear MRCC team,
  When I tried to run SRMRCCSD calculation of singlet dioxygen with CAS(8,6) as reference, the program gave correct CASSCF energy but continued to run single-reference CCSD calculation. The problem disappeared after changing reference to CAS(12,8). The output files are attached below. I applied the patches mentioned in www.mrcc.hu/index.php/forum/general-questions/316-mcscf-ccsd before all the calculations.

Thank you for your help!
It works.