CA7 MUF gets U0004 when using AL2MUFS1 member

Products

• Datacom
• DATACOM - AD

Issue/Introduction

Installed Datacom/AD 15.1 for CA 7. Using the AXDATIN1 and AXDATIN2 members from Datacom/AD CUSMAC as SYSIN members to start the Datacom Multi-User (MUF) , all works fine.

Replacing them with members AL2MUFS1 and AL2MUFS2 from CA 7 CAL2OPTN library, the MUF region cannot start:

DB00216E - ERROR IN SYSIN/SYSIPT DATA               
IEF450I CA7MUF AD15STRT - ABEND=S000 U0004 REASON=00000000 

Environment

z/OS

Datacom/AD 15.1 

Cause

The real error is the following:

CA7MUF:DB01900I - *-------------------*OPTIONAL START-UP PARMS FOR AXDATIN1 --------------
CA7MUF:DB01900I - XCF_FROM *,*,*,YES XCF RECEIVE FROM SYS, JOB, GROUP, ALLOW
CA7MUF:DB01909E - * - ASTERISK POINTS NEAR ERROR
CA7MUF:DB01911E - PARAMETER HAS INVALID VALUE

that triggers another error 

CA7MUF:DB00216E - ERROR IN SYSIN/SYSIPT DATA

at the end of the input cards.

In this specific case, the XCF_FROM card is considered invalid as the DBSIDPR macro (assembled on AXCUSNEW job, when running a new installation for Datacom/AD) is not set up to implement XCF connectivity.  

Resolution

Two possible solutions:

1. If your MUF is running on a LPAR and a CA 7 address space that is running on a different LPAR needs to connect to this MUF, set up the XCF connection as outlined on this article "How to configure CA Datacom MUF for XCF use" .
2. If MUF and CA 7 are running on the same LPAR (so no XCF is required), comment the XCF_FROM card and change the 5th parameter in the TASKS card to 0; e.g. TASKS n,nK,0,0,0

Additional Information

For DATACOM MUF DBMUFPR SYSIN cards , see Modify MUF Startup Options and Console Commands.