MIM0123E UNRECOGNIZED COMMAND

Products

• MIM Resource Sharing (MIM)
• MIM Data Sharing (MII)
• MIM Tape Sharing (MIA)
• MIM Message Sharing (MIC)

Issue/Introduction

Can't figure out why MIM won't take command:  .4,D A,L

Note: In the following examples, the "." character is defined as the CA MIM command prefix (eg. CMDPREFIX= value defined in MIMINIT)

.4,D A,L                       
MIM0067I COMMAND 4         
MIM0123E UNRECOGNIZED COMMAND 4

However, these commands targeted for same system work fine:

.04,D A,L                                                             
IEE114I 11.30.35 2019.213 ACTIVITY
 JOBS     M/S    TS USERS    SYSAS    INITS   ACTIVE/MAX VTAM     OAS 
00002    00053    00005      00033    00082    00005/00200       00017

.SYS04,D A,L                                                           
IEE114I 11.41.06 2019.213 ACTIVITY
 JOBS     M/S    TS USERS    SYSAS    INITS   ACTIVE/MAX VTAM     OAS 
00002    00053    00005      00033    00082    00005/00200       00017

These also work -  abbreviated to "2" and  abbreviated to "1" (targeted for different systems in MIMplex): 

.2,D A,L                                                             
IEE114I 11.31.42 2019.213 ACTIVITY
 JOBS     M/S    TS USERS    SYSAS    INITS   ACTIVE/MAX VTAM     OAS
00001    00050    00002      00033    00007    00002/00200       00012

.1,D A,L                                                             
IEE114I 11.32.32 2019.213 ACTIVITY
 JOBS     M/S    TS USERS    SYSAS    INITS   ACTIVE/MAX VTAM     OAS
00014    00071    00041      00034    00072    00041/00300       00028

Environment

Release : 12.5

Component : MIM

Cause

• Incorrect use of system ALIAS.
• ALIAS, like the SYSTEM name, is character data, therefore it has to be an exact match.
• In the above commands where the "abbreviated" value worked...they worked because the INDEX was used.
•  INDEX is a numeric value and can therefore allows for truncation.  

Below are some configuration items to look at to understand how MIM is setup:

MIMINIT definition:

DEFSYS (SYS01,01,SYS01,INITIAL=FREED),
       (SYS02,02,SYS02,INITIAL=FREED),
       (SYS04,04,SYS04,INITIAL=FREED)

MIM display command:

.DISPLAY SYSTEMS
MIM0067I COMMAND DISPLAY
MIM0108I SYSTEMS DISPLAY

   INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
   01    01    SYS01    EXTERNAL ACTIVE      ZOS    2019.218 06:39:29.95
   02    02    SYS02    EXTERNAL ACTIVE      ZOS    2019.218 06:39:30.34
   03    04    SYS04    LOCAL    ACTIVE      ZOS    2019.218 06:39:30.73

Resolution

If using the ALIAS, specify the ALIAS exactly as defined. Otherwise use INDEX or SYSTEM name.