2501781 - SUM : "Could not determine database information" - DMTINFO_XX.LOG

During an upgrade with SUM (Software Update Manager)

The following error reported in the log:

DETERMINE-DB-INFO_xx.LOG :

...
Jul 10, 2017:39:22 AM [Error ]: Error while executing command dbinfo.
Jul 10, 2017 11:39:22 AM [Error ]: Return code condition success evaluated to false for process java.exe for action dbinfo.
Jul 10, 2017 11:39:22 AM [Error ]: The following problem has occurred during step execution: com.sap.sdt.util.diag.DiagException: Could not determine database information. The process launched to connect to the database has not been completed.
Could not complete DMT process. Check the DMTINFO.LOG log file.
Could not execute DMT command dbinfo with arguments C:\SUM\sdt\config\DBINFO.XML.
Return code condition success evaluated to false for process java.exe for action dbinfo.

DMTINFO_xx.LOG :

Execution failed: Program has finished with error. Exit code: 1
Execution has been terminated. More information can be found in the log file C:\SUM\sdt\log\SUM\DMTINFO_xx.LOG.
Could not set up a database connection. See previous messages.
Could not establish open SQL connection. Exception com.sap.sql.log.OpenSQLException: Exception of type com.ibm.db2.jcc.am.SqlInvalidAuthorizationSpecException caught: [jcc][t4][2010][11246][3.64.141] Connection authorization failure occurred. Reason: Local security service non-retryable error. ERRORCODE=-4214, SQLSTATE=28000..
com.sap.sql.log.OpenSQLException: Exception of type com.ibm.db2.jcc.am.SqlInvalidAuthorizationSpecException caught: [jcc][t4][2010][11246][3.64.141] Connection authorization failure occurred. Reason: Local security service non-retryable error. ERRORCODE=-4214, SQLSTATE=28000.
com.ibm.db2.jcc.am.SqlInvalidAuthorizationSpecException: [jcc][t4][2010][11246][3.64.141] Connection authorization failure occurred. Reason: Local security service non-retryable error. ERRORCODE=-4214, SQLSTATE=28000

Return code: 1

Upgrade on a SAP System running with DB6

SYS_INFO_EXPORT, configure, prepare-configuration, determine-db-info, com.sap.sdt.j2ee.services.servicesimpl.DMTService, class com.sap.sdt.util.diag.DiagException, JAVA only stack , KBA , BC-UPG-PRP , Upgrade Preparation , BC-DB-DB6 , DB2 Universal Database for Unix / NT , Problem