This is the 1166th most frequent German word.
fehler
Error; mistake.
The word 'Fehler' is used here to mean a mistake or error in the context of conducting an investigation.
Ich habe einen kleinen Fehler in meiner Untersuchung gemacht.
I made a small mistake in my investigation.
The word 'Fehler' is used here to refer to a malfunction or flaw in software.
Es gibt einen Fehler in der Software, der einen Absturz verursacht.
There is a bug in the software causing a crash.
'Fehler' is implied in the adjective 'fehlerhaft', indicating something erroneous related to billing or accounting issues.