3094682 - SWPM failed with: R3load.exe" -testconnect' exits with error code 12

System copy of AS ABAP System failed in testDatabaseConnection phase - using 70SWPM10SP Software Provisioning Manager (SAP Note: 1680045).

The logfiles contain the error entries: (/<sapinst_instdir>/.../sapinst_dev.log.log and R3load.exe.log):

sapinst_dev.log:

...

ERROR <timestamp>  (<user>) (startInstallation) [CSiStepExecute.cpp:1104] id=controller.stepExecuted errno=FCO-00011 CSiStepExecute::execute()
The step testDatabaseConnection with step key |NW_Export|ind|ind|ind|ind|0|0|NW_ABAP_Export_Dialog|ind|ind|ind|ind|abapUnload|0|NW_ABAP_Export|ind|ind|ind|ind|2|0|testDatabaseConnection was executed with status ERROR (Last error reported by the step: Process call '/.../sapinst_instdir/NW7##/LM/COPY/ORA/EXP/CENTRAL/AS-ABAP/EXP/R3load -testconnect' exits with error code 12. For details see log file(s) R3load.exe.log).

R3load.exe.log:

/.../sapinst_instdir/NW7##/LM/COPY/ORA/EXP/CENTRAL/AS-ABAP/EXP/R3load -testconnect

...

A1EEGEN 000 (DBS) db_connect failed with rc = 256 'failed to connect to the database'
A1EEGEN 000 (DBS) DbSlErrorMsg rc = 29 'connect failed without SQL error'
A1EEGEN 027 Exit code: "12"

All SAP system based on NW 7.0# (<NW 7.40)

70SWPM10SP - Software Provisioning Manager 1.0

Oracle 11g and higher

AnyDB

LOADTOOLS.SAR, 7.53, R3load, RC12, DB connection, R3load -testconnection, dbrc=29, rc = 29 , KBA , r3load -testconnection , BC-INS-SWPM , Installation with Software Provisioning Manager , BC-INS-MIG , OS/DB Migrations with SWPM and DB refresh , Problem