Solution : https://service.sap.com/sap/support/notes/560756 (SAP Service marketplace login required)
Summary : 
      This SAP composite note provides critical guidance for implementing and troubleshooting the Note Assistant tool version 1.2, covering various releases and support package levels, such as SAP Basis 4.5B, 4.6X, and SAP Web AS 6.X. Specific notes address errors like incorrectly evaluated note validities, problems during upgrades, and pilot release status notes. It highlights essential precursors such as note 451215 and specifies common issues including generation errors and the incorrect handling of note corrections. The note is crucial for maintaining system integrity and ensuring the correct application of updates through the Note Assistant tool.
Key words : 
spau displays obsolete note corrections, incorrectly evaluated note validitiesif, transport object r3tr note, note assistant removes corrections, install note assistant version 1, support package level 27, support package level 13, pi ispsadin insurance, status 'pilot release', note assistant version 1
Related Notes : 
       
| 875986 | Note Assistant: Important notes | 
| 686196 | Note Assistant: Note validities analyzed incorrectly | 
| 681069 | Note Assistant: Notes in the status 'pilot release' | 
| 640609 | SPAU incorrectly displays note corrections as obsolete | 
| 635686 | Problems when deimplementing an invalid note | 
| 602508 | Processing the Note Assistant in the upgrade | 
| 576743 | Note Assistant 1.2: generation error during installation | 
| 574872 | Unpacking a data file with version ... not supported | 
| 567362 | Note Assistant: Return code 8 for import postprocessing | 
| 495861 | IS-PS: Problems w/ implementing notes via Note Assistant | 
| 451215 | Note Assistant Version 1.1: Important notes | 
| 442176 | Note Assistant during upgrade to 4.6D | 
| 394331 | Upgrading to 4.X: Error message with CWB* tables | 
| 109627 | Assign FI-CA Support Package name to Add-On SP name |