MUFPLEX DB01917E - INVALID MIX OF OPTIONS

Document ID : KB000093647
Last Modified Date : 04/05/2018
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Question:
Why after increasing my CA Datacom TASKS startup option, the MUF startup fails with: 

DB01917E - INVALID MIX OF OPTIONS - CONFLICT WITH MUFPLEX OPTION 4
Environment:
z/OS
Answer:
The CA Datacom MUF log shows...

DB01900I - MUFPLEX    SYSCPLEX,*,,300,S 
... with... 
DB01900I - TASKS      500,60K,0,0,250       # OF TASKS,SIZE,0,0,XCFTASKS  
DB01909E -               * - ASTERISK POINTS NEAR ERROR                   
DB01917E - INVALID MIX OF OPTIONS - CONFLICT WITH MUFPLEX OPTION 4  
 
In this example, the MUFPLEX named SYSCPLEX specified tasks (max_tasks) need to be larger than the tasks in the TASK statement.  

Since 500 TASKS have been specified, the MUFPLEX 300 tasks need to be increased.

Changing the MUFPLEX tasks to 501 instead of 300 resolved the problem.
Additional Information:
As documented in CA Datacom Core - 15.1 section MUFPLEX
  • ,max_tasks
    (Required) The maximum tasks value is the most each Multi-User Facility within an enabled MUFplex is allowed. The first enabled Multi-User Facility effectively establishes this number, and no newly enabled Multi-User Facility is allowed to request more. To change the number, all Multi-User Facilities must be ended and then, with a larger value, restarted. Space is reserved for seven Multi-User Facilities to be enabled with each having at most this number of tasks. Best performance occurs when the max_tasks number is not much larger than the number of tasks used in the executing Multi-User Facilities.
    • Valid Entries:
      1 thru 4000 (can be specified as an integer or an integer followed by K to represent the integer multiplied by 1024)