I think it expected to be installed in /usr/local and company procedures demanded that it was installed in /opt (or the other way around).
For this it would consequently misplace some permissions on some of the files causing a later stage in the installer to fail and bork the installation.
I bumped into her last year at Ansible Fest London and she was still angry about it 17 years later!
And that's what Oracle does to your soul :)
Edit: that N class and Oracle NEVER got deployed in the end. It just sat there unused, licenses weren't renewed, it got sheepishly powered down after a few months to save electricity and it got chucked in a skip after 5 years. About £200k of expenditure down the pan.
I guess you could easily lost even more money. Good thing they stopped it at £200k.
The whole platform got replaced with SQL Server on a clone PC server in the end which cost less than £10k. No fan of Microsoft but there was no competition. And the tooling was far better!
Legal guys said it wasn't worth suing them because we'd have to pay up then or lose the support contract.