In this helpful article, I will discuss all about the Access warning message “Run time error ‘3464’: data type mismatch in criteria expression…” This error generally appears when a query encounters a mismatch between data types or attempting to filter out a SUBFORM when selecting a value in a combo box. It can disrupt workflow and hinder productivity. Therefore, let’s delve into this blog and learn why MS Access error 3464 occur and how to fix it effectively.