Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
error [ˈɛrər] n оши́бка#
typing error опеча́тка#
spelling error орфографи́ческая оши́бка#
in error по оши́бке
errors and omissions excepted не счита́я оши́бок и про́пусков
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.