The phrase "a real error" is correct and usable in written English.
It can be used to emphasize the authenticity or seriousness of a mistake or fault.
Example: "After reviewing the data, we discovered a real error in the calculations that affected the final results."
Alternatives: "an actual mistake" or "a genuine error."
This shows you a real error of intelligence.
It makes me wonder why Berliners didn't save come of the Wall; a real error don't you think?
To the Sports Editor: If there's a real error and injustice here, it's in considering the "official" result carved in granite rather fixable with an eraser.
We are guests in their home and even though it was an accident, even though it was not intentional, we had made a bad mistake, a real error and the people deserved my apology, the president deserved my apology.
Clearly, there was a real error in judgment, and that primarily had to do with listening to a lot folks who were civilians in suits and silk ties, and not listening enough to the generals with mud and blood on their boots and medals on their chest.
Make a real error (Imade plenty) and you may end up correcting letters you never actually typed.
Clinton refused to admit any real errors.
They make no real mistakes but the ice is definitely looking a touch slower and they can't make up the pace needed despite only one real error, a slight touch of the side towards the end.
Her critics, most of them Chinese immigrants, picked apart her story, and, though they found a few real errors, most of their criticism was highly speculative.
This paper describes the development of a real time error measuring device for the simultaneous measurement of movement errors in straightness, yaw and roll in a linear machine stage.
This problem has been solved by a new feedback control technique called "dynamic PID control", in which a false error signal proportional to the real error signal is automatically added to the real error signal when A exceeds As (i.e., when the downhill region of the sample is being scanned).
