Also check out How to force SNOTE to apply outdated SAP notes
Disclaimer: the procedure given in this document is in no way recommended (nor supported by SAP) and you shouldn't follow the procedure unless you know exactly what you are doing. Regardless, I don't take any responsibility for any possible errors/inconsistencies if any should occur because of following the procedure described in this document.
SAP NetWeaver 7.3 EHP1 SPS04 (AS ABAP) was the reference system while writing this document.
Having gone through another upgrade (this time from EHP6 to EHP7) and having to face the problem again where SUM is requesting you to reset a SAP note but you simply can't do it because SNOTE is unable to download the SAP note due to it not being released, prompted me to share another debugger hint.
After this the operation is cancelled, unless...
Go to SE37 and open function module SCWB_NOTE_RESET_TO_ORIGINAL in Display mode. Insert the following session break point
... and repeat the procedure. When the debugger stops at the break point simply delete the contents of the internal table lt_notes_for_downl to bypass downloading the SAP note and instructing the system to use the version already downloaded.
Et voilà, there you have it. You will now be able to reset the SAP note and continue with SUM.
