It means you have a statement in your code that doesn't DO anything - it doesn't alter any state and thus doesn't have any effect on anything. That is seen as an error.
One example of this could be if you have a line like this (where MyFunction is a function declared elsewhere):
In this code there is a statement which just states the reference to MyFunction but doesn't do anything with it. If you wanted to call the function, you should remember the paranthesis:
Now the code actually calls MyFunction, so it's not seen as a coding error anymore.
answered Jul 27 '10 at 08:24 AM
An additional example that's not a function missing brackets:
I've been stuck with this error for accidentally putting the statements of a For loop in the wrong order. Due to the rarity of the traditional For(Intialisation;Condition;Increment) structure in my code, (and lack of syntax reference in the help file) this elementary error took a while to spot.
Placing my order as For(Intialisation;Increment;Condition), it tried to treat a condition as a change. Which is how I think I got this error.
answered Dec 03 '10 at 03:19 PM