TMSGRW incorrectly lists scratch tapes

Products

• CA 1 Flexible Storage
• CA 1 Tape Management - Copycat Utility
• CA 1 Tape Management - Add-On Options

Issue/Introduction

Scratch tapes are listed in the TMSGRW report although they should have been rejected
using the following Control statements to list all non scratch tapes with volumes starting with a V. 

//TMSGRW.SYSIN DD *                   
CONTROL-SECTION
 TITLE 'NON SCRATCH TAPES V VOLSERS' 
 ALTER DSNB=YES                       
 DEFINE SCRTCH HX '04'               
 DEFINE VOLPREF CH 'V'                 
PROCESS-SECTION                       
 WHEN FLAG1 ON SCRTCH                 
 REJECT                               
 WHEN VOLPREF EQ VOLSER               
 LIST                                 
REPORT-SECTION                         
 PRINT VOLSER                         
 PRINT VOLSEQ                         
 PRINT DSN                             
 PRINT NUMDSNB                         
 PRINT FLAG1                           
/* 

In the TMSGRW report scratch volumes appear with NUMDSNB > 1.

What is the reason for that?

Environment

Release :

Component : CA 1 Tape Management

Cause

TMSGRW correctly rejected scratch tapes. However, the TMC had chaining errors with used DSNBs still referring to scratch volumes, which show up
in the TMSGRW report with NUMDSNB > 1. These "orphaned" used DSNBs were listed in the TMSGRW report because of ALTER DSNB=YES.
The related chaining erros are ERR31 and ERR36: 

ERR31 VOL xxxxxx POINTS TO DSNB xxxxxx NOT TO yyyyyy
ERR36 DSNB xxxxxx IS NOT IN CHAIN FOR VOL xxxxxx

Resolution

In case DSNBs are not required for the Report run TMSGRW with ALTER DSNB=NO as a workaround.
Fix the pointer errors as described in the CA 1 documentation:

ERR31 VOL xxxxxx POINTS TO DSNB xxxxxx NOT TO yyyyyy 

Reason:
This is a multi-data set chaining error. The volume indicated has a chain of DSNBs or no associated DSNBs, but a DSNB not part of the chain is referencing the volume in VOLSER. 

Action:
The DSNB should be cleared and returned to the free chain with TMSAGGR or the VOLSER field set to the proper VOLSER.

ERR36 DSNB xxxxxx IS NOT IN CHAIN FOR VOL xxxxxx

Reason:
This is a multi-data set chaining error. The volume indicated has one or more DSNBs that refer to a DSNB that does not reflect the indicated volume in the VOLSER field. 

Action:
Update the invalid DSNB with the correct information or set the NEXT value in the DSNB referencing the DSNB not in the chain to HEXZEROS. Return the invalid DSNB to the free chain with TMSAGGR.