The ISERR() function returns True if its parameter is an error other than N/ A. Otherwise, it returns False. Use ISERROR() if you want to include the N/ A error as well.
De funksje ISERR () jout Wier werom as de parameter in fout is oars as N/ A, en oars Net- wier. Brûk ISERROR () as jo ek de fout N/ A ynslute wolle.