Getting error message CSV003I REQUESTED MODULE CSLCHRCV NOT FOUND

Products

• Database Analyzer for DB2 for z/OS
• Fast Unload for DB2 for z/OS
• Fast Check for DB2 for z/OS
• Fast Index for DB2 for z/OS
• Rapid Reorg for DB2 for z/OS

Issue/Introduction

Got the following error messages in the access to CA Database Management Solutions for DB2 for z/OS main menu just after the upgrade to Release 20.0. 
  
CSV003I REQUESTED MODULE CSLCHRCV NOT FOUND
CSV028I ABEND806-04  JOBNAME=SBSXP60   STEPNAME=IEFPROC
IRX0250E System abend code 806, reason code 00000004.
IRX0255E Abend in host command ISPEXEC or address environment routine ISPEXEC.
IRX0250E System abend code 806, reason code 00000004.
IRX0255E Abend in host command ISPEXEC or address environment routine TSO.
IRX0250E System abend code 806, reason code 00000004.
IRX0255E Abend in host command ispexec or address environment routine TSO.

Environment

Release : 20.0

Component : General Services for DB2

Resolution

There was some kind of storage corruption caused by wrong characters in R200.CDBAPARM(SETUPxx) member. 
  
In the SETUPxx member there was the following for SSIDVERC parameter.
  
SSIDVERC (V12R1M500)  
EECCECDC44EFFDFDFFF544
229455930D512914500D11 
 
Note the two hex values X'41' and X'41' after the X'5D' value, these values should be X'40' and X'40'.
These values caused an storage overlay with unpredictable results and the Abend S806. 

The SETUPxx member was updated manually and the X'41' were introduced for an unknown reason. 
  
The best option is you update the R200.CDBAPARM library through Post-Install Tasks, on this way this kind of errors will be avoided.