Hello Marianne,
I have tried both the articles but no help. There is no specific kind of erros which can address the issue in the RAWINST20.HTM.
05-23-2019,22:49:01 : Property(S): VersionNT64 = 603
05-23-2019,22:49:01 : Property(S): VersionMsi = 5.00
05-23-2019,22:49:01 : Property(S): VersionDatabase = 300
05-23-2019,22:49:01 : Property(S): CLIENTPROCESSID = 1572
05-23-2019,22:49:01 : Property(S): MSICLIENTUSESEXTERNALUI = 1
05-23-2019,22:49:01 : Property(S): CURRENTDIRECTORY = C:\ProgramData\Veritas\Backup Exec\{01FA58EE-0136-4113-92E4-AD555504BA41}
05-23-2019,22:49:01 : Property(S): INSTALLUIMODE = 1
05-23-2019,22:49:01 : Property(S): VMWAREGUEST = 0
05-23-2019,22:49:01 : Property(S): ENABLEADVRT = 1
05-23-2019,22:49:01 : Property(S): REINSTALLMODE = emus
05-23-2019,22:49:01 : Property(S): REBOOT = ReallySuppress
05-23-2019,22:49:01 : Property(S): EXE_ENVOKED = 1
05-23-2019,22:49:01 : Property(S): PackagecodeChanging = 1
05-23-2019,22:49:01 : Property(S): ProductState = -1
05-23-2019,22:49:01 : Property(S): TRANSFORMSATSOURCE = 1
05-23-2019,22:49:01 : Property(S): TRANSFORMSSECURE = 1
05-23-2019,22:49:01 : Property(S): PATCH = D:\BE 20.3\BE\WINNT\INSTALL\RAWSX64\Updates\1188RSP.msp;
05-23-2019,22:49:01 : Property(S): FAMILY0 = D:\BE 20.3\BE\WINNT\INSTALL\RAWSX64\Updates\1188RSP.msp
05-23-2019,22:49:01 : === Logging stopped: 23/05/2019 22:49:01 ===
05-23-2019,22:49:02 : The return code from the MSI is: 1603
05-23-2019,22:49:02 : AgentSeqDlgs::PostInstallActions
05-23-2019,22:49:02 : AgentSeqDlgs::Misc_BE_CommonOps
05-23-2019,22:49:02 : The return value for Backup Exec Agent for Windows returned error code: 1603
05-23-2019,22:49:02 : Clean up Symantec installer keys.
05-23-2019,22:49:02 : Cleaning up the symc status key
05-23-2019,22:49:05 : AgentSeqDlgs::Misc_BE_CommonOps
05-23-2019,22:49:05 : Dialog Sequence Returning errorlevel 1603
+ 05-23-2019,22:49:05 : The Installation Failed!