When exploring invalid use of null, it's essential to consider various aspects and implications. Invalid use of Null (Error 94) | Microsoft Learn. Null is a Variant subtype used to indicate that a data item contains no valid data. This error has the following cause and solution: You are trying to obtain the value of a Variant variable or an expression that is Null. Similarly, fixing MS Access “Run Time Error 94 Invalid Use Of Null”– 5 Easy Ways!.
This article walks you through detailed information and step-by-step methods to fix run time error 94 invalid use of null Access effortlessly. Moreover, why am I getting an "Invalid use of Nulls" error in my query?. Building on this, casting functions, like CStr, are very prone to trigger Invalid use of null.
There shouldn't be a need to use CStr in joins, as it will typecast to get equality.
📝 Summary
To sum up, this article has covered important points about invalid use of null. This overview provides important information that can assist you in better understand the topic.