3134882 - "DDIC password does not work" error in SUM phase PREP_EXTRACT/SUMASK

• During an upgrade using Software Upgrade Manager, an error is observed in phase " PREP_EXTRACT/SUMASK".
• Below error can be found in SUMASK.LOG
  ERROR: DDIC password does not work:
  RFC login to system <SID> ashost <Hostname> nr <Instance No.> gwhost <Hostname> gwservice sapgw01 failed with code 1 key RFC_COMMUNICATION_FAILURE: 
  LOCATION    CPIC (TCP/IP) on local host with Unicode
  ERROR       partner 'Hostname:33xx' not reached
  TIME        Tue Nov 23 23:50:52 2021
  RELEASE     753
  COMPONENT   NI (network interface)
  VERSION     40
  RC          -10
  MODULE      /bas/753_REL/src/base/ni/nixxi.cpp
  LINE        3454
  DETAIL      NiPConnect2: 192.168.80.17:3301
  SYSTEM CALL connect
  ERRNO       111
  ERRNO TEXT  Connection refused
  COUNTER     15
  .
  Password for user "SYSTEM" is invalid:
  The hdbsql connection is not possible due to the following error message: * 10: authentication failed SQLSTATE: 28000

• You have verified that the DDIC password is correct.
• Gateway is up and running.

Software Update Manager
SAP Netweaver ABAP

PREP_EXTRACT/SUMASK, DDIC password does not work, SUMASK, RFC login, failed, RFC_COMMUNICATION_FAILURE, NI (network interface), Connection refused, Password for user "SYSTEM" is invalid, SYSTEM, DDIC, * 10: authentication failed SQLSTATE: 28000, SQLSTATE: 28000, Software Update Manager, SUM, password, hdbsql , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem