I see that there will have to be some criteria for my error collection so it doesn’t get clogged up with little, inconsequential errors. For instance, I got two in a row yesterday:

% IDL --feed-ir
IDL: Command not found
% idl --feed-ir
error: need file name for --feed-ir

The first was caused by the capslock being on, the second because I simply forgot to type a filename. They hardly slowed me down at all, and had no other consequences.

Like any collection, I want my error collection to contain valuable items, in addition to being a record of my experiences. I think my criteria will be this: the most valuable error is the one with the most heinous consequences. So I will record the errors that cause me true grief, and perhaps try to make light of them.