As a native American English speaker, I wrote the following error message for our application: "There was an error. Please contact administrator."
A native German speaking colleague asked me why I didn't write, "Please contact the administrator."
Both of course sound correct to me, and I find thousands of instances of "Please contact administrator" when googling.
Why is it that as a native American English speaker, I find "Please contact administrator" correct while e.g. I don't find "There was error." correct?
Does anyone know of a linguistic rule which explains when one can leave out articles and when one can't?
It seems to have to do with headlines as someone suggested in the comments, but also instructions. Has there been any research on this to determine all the contexts in which articles can be omitted in this way?