Dutchman's Curse

The Dutchman's Curse is any sentence that starts with "It's just a matter of...", "It should be working...", or something similar, implying that it will take no time to complete at all, but in reality always turns into being a lot more work.

Supervisor - It's just a matter of copying that line of code into this file.

-- 5 hours later --
Employee - I'm still working on it since I had to rewrite the file to get that line of code to work. Stupid Dutchman's Curse.