CMA SPOOL Data Display Failure: IUIU or PE FROM COMMAND INTERFACE Errors.

Products

• OM Spool

Issue/Introduction

When entering the CMA emulation, no jobs are displayed. Instead, the following error messages appear in the interface or logs:

• PE FROM COMMAND INTERFACE
  
  
• IUIU FROM COMMAND INTERFACE

The Started Task (STC) appears to be running normally in SDSF and continues to send jobs to the CMA, but the user interface fails to populate data.

DC command shows:

=ESF864  CID MENU0005/G STARTED             
=ESF864  CID MENU0004/G STARTED             
=ESF864  CID MENU0003/G STARTED             
=ESF864  CID MENU0002/G STARTED             
=ESF864  CID MENU0001/G STARTED     

Environment

z/OS

OM Spool 14.0

Cause

• These messages indicate that all available communication channels are busy.
  
  
• The MAXPORT parameter in the CID Menu Statement limits the number of concurrent command interface sessions.
  
  
• When this limit is reached, new sessions cannot retrieve and display job data.

 

Resolution

1. Issue the DC command against the Spool started task to verify the number of active CID MENU sessions.
   
   F spoolstc,DC
   
   
2. Locate the CID Menu Statement in your initialization parameters.
   
   
3. Increase the MAXPORT value. If currently set to 5, increase it to 10.
   
   
4. Restart the Spool started task to apply changes.
   
   
5. Monitor performance; for high-volume sites, further increments (up to 20 or higher) may be required based on peak workload.

#Note - the optimal value will differ between sites and is dependent upon workload

Additional Information

MAXPORT - CID Statement