My setup at work did not allow me to install the latest TeX Live via the net installer. Instead, I downloaded the huge ISO, mounted it to some unused drive, and installed it from there without adding any options.
After installation, I unmounted the ISO drive and performed a package update via the command line
tlmgr update --self --all --reinstall-forcibly-removed
to see if there are any software/package updates. However, I received the error message that pointed to the original mounted location for the ISO, stating
Cannot determine type of tlpdb from R:! tlmgr.pl: Cannot load TeX Live database from R:
R: was the original drive I mounted the ISO to).
How do I maintain/update my distribution in this case?