2430694 - SWPM Error: "Assertion failed: Unable to update secure storage files"

• While performing an install or migration, the Software Provisioning Manager (SWPM) fails
• The following error message can be found in the sapinst_dev.log:

WARNING <date> <time>
Execution of the command "rsecssfx put DB_CONNECT/DEFAULT_DB_PASSWORD -valuefile valuefile.txt -valuefile7bit" finished with return code 249. Output: 
SSFX-0348: Value file "valuefile.txt" cannot be opened for read:
Permission denied (errno = 13)
 
ERROR <date> <time>
Assertion failed: Unable to update secure storage files. Refer to trace file sapinst_dev.log for further information.
 
ERROR <date> <time>
The step syb_step_add_secstore_info with step key |NW_ABAP_OneHost|ind|ind|ind|ind|0|0|NW_Onehost_System|ind|ind|ind|ind|onehost|0|NW_CreateDBandLoad|ind|ind|ind|ind|createdbandload|0|
NW_CreateDB|ind|ind|ind|ind|createdb|0|NW_SYB_DB|ind|ind|ind|ind|SYB_DB_CONTEXT|0|syb_step_add_secstore_info was executed with status ERROR

• Software Provisioning Manager tool (SWPM);
• Systems based on SAP NetWeaver 7.1 or higher;
• Database Sybase (ASE);
• Operating System Unix-based.

Software Provisioining Manager, SWPM, SAPinst, Installer, Install, Installation, System Copy, Copying, Migration, Migrate, Migrating, OS/DB, OSDB, Homogeneous, Heterogeneous, HSC, NW, 7.1, 7.11, 7.2, 7.3, 7.31, 7.4, 7.5, 710, 711, 720, 730, 731, 740, 750, AS, Java, ABAP, Backup, Restore, Backup/Restore, Restoring, Export, Exporting, Import, Importing, Sybase, ASE, Unix, Linux, Red Hat, RedHat, Suse, SSFS , KBA , BC-INS-UNX , Installation Unix , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , BC-INS , Installation Tools (SAP Note 1669327) , BC-INS-MIG , OS/DB Migrations with SWPM and DB refresh , Problem