I implemented in 22R1 this easy solution posted by Sharif Ahammad https://www.acumatica.com/blog/extending-attribute-searches-in-acumatica/.
It works. However, when I try to filter by attributes I get the following error:
![](https://uploads-us-west-2.insided.com/acumatica-en/attachment/980297af-6231-45da-a0c7-4ab94d00e064.png)
I guess it has something to do with the null attribute values. Has anybody fixed this issue?