1888664 - Upgrade Error Message in phase INITPUT_PRE: Personalization failed for MSSUPGGETREL

While performing an Upgrade, an error takes place in phsae INITPUT_PRE, under module PREP_PRE_CHECK:

SAPup broke during phase INITPUT_PRE in module PREP_PRE_CHECK / Checks the system status
Error Message: Personalization failed for MSSUPGGETREL

and

Begin entries during phase INITPUT_PRE, 20130612224046
Reading value:
HKEY_CURRENT_USER\Environment\DIR_LIBRARY failed:

ErrorMessage: The system cannot find the file specified.

Additional information:

"1EETQ399 Calling registered function with pattern 'INITPUT*' failed!
1EETQ399 Last error code set is 'Personalization failed for MSSUPGGETREL"

and

"# Error message set: 'File '...abap\bin\MSSUPGGETREL.SQL' does not exist:
The system cannot find the file specified."

You are using and up-to-date version of SUM but still have this error.

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