3645993 - DB6: SQL30082N Security processing failed with reason "24" ("USERNAMEAND/OR PASSWORD INVALID") using SSFS (Secure Storage File System)

SAP Application server cannot connect to the Database.

R3trans reports 
4 ETW000  [     dev trc,00000]  *** ERROR in DB6Connect[/bas/753_REL/xxx/xxx/db6/dbdb6.c, 0000] CON = 0 CACHEID = -1 (BEGIN)
4 ETW000  [     dev trc,00000]  &+     DbSlConnectDB6( SQLDriverConnect ): [IBM][CLI Driver]
SQL30082N  Security processing failed with reason "24"("USERNAME AND/OR PASSWORD INVALID").  SQLSTATE=08001
4 ETW000  [     dev trc,00000]  &+
4 ETW000  [     dev trc,00000]  &+
4 ETW000  [     dev trc,00000]  &+
4 ETW000  [     dev trc,00000]  *** ERROR in DB6Connect[/bas/753_REL/xxx/xxx/db6/dbdb6.c, 0000] (END)
4 ETW000  [dbdb6.c     ,00000]  *** ERROR => DbSlConnect to '<SID>' as 'sap<sid>' failed
2EETW169 no connect possible: "DBMS = DB6                              --- DB2DBDFT = '<SID>'" 

The system is using SSFS(Secure Storage File System) and not the dscdb6.conf password file for the sap connect user access.

SAPup fails with the error  DbSlConnectDB6: can't find user 'sap<SID>' in '/usr/sap/<SID>/SYS/global/dscdb6.conf'  

The /SUM/abap/log indicates that SSFS is used
ENV: RSEC_SSFS_DATAPATH=/usr/sap/<SID>/SYS/global/security/rsecssfs/data
ENV: RSEC_SSFS_KEYPATH=/usr/sap/<SID>/SYS/global/security/rsecssfs/key
ENV: SAPSYSTEMNAME=<SID
ENV: dbms_type=db6
*DBENV: dbs_db6_schema=SAP<SID>
ENV: dbs_db6_user=sap<sid>
ENV: rsdb_ssfs_connect=1

Db2 LUW IBM

encryption, secure, security, file system level, operating system, disk, dscdb6up, the lengths of operating system passwords were limited to 16 characters.  With SSFS, secure storage supports longer passwords, defining passwords of up to 64 characters is possible, Connect User, SAP, DB6 , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , Problem