10. Ever seen Un-Noticed Backtracking Mechanisms of HDBLCM?

Yes, I have experienced below backtrack mechanism - tested and confirmed.

If we directly run HDBLCM without providing component root directory, then --

By default, HDBLCM will check from the scratch of the Path and determine whether HANA update files exist or not.

Consider my case, 

I have two HANA DB Version files placed in below path.

Rev 080 - /hana/shared/software/DATA_UNITS
Rev 081 - /hana/shared/software/HANA_REV81

I went inside HANA_REV81/hdblcm and run ./hdblcm command (without any component root directory), Rev 080 file updates/options will be shown instead of Rev 081.

⭐This is due to hdblcm backtracking with Alphabetical order.
First come First serve - D - fetches and provides Rev 080 DB version files for selection.

Hence, To avoid these kind of suprises, Ensure to provide component root directory or delete unnecessary old HANA DB software files.

Note 2115815 - Information on HANA DB Upgrade and Patch

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