An explicit Category specifier is required ...(know how to fix) but -->

Hi All,

I would like to ask someone, if you not specify category in UPROPERTY(Category = “ABC”)

In my case i made plugin and when packing there was no error with type → An explicit Category specifier is required .
Seems strange because one of the customers got theese errors that Category specifier is missing… WHY I am not getting theese errors ? ,simply engine will package without errors & in customer case compiler think that missing Cat.specifier is error ? …
Question is - > what Do I need to do to get theese errors register same ? , because there is hard to track where this category specifier is missing if you have many classes in my case because no errors exists .

I am using VS2015, is there possibility that there is some missconfiguration in my VisualStudio or buildSettings…?
or is there difference between VS versions , that one will track theese missing Categories & other version not ?
Or what is possible solution to enable it ?

What should be normal compiler behavior to get theese errors or not ?
What is that MYSTERY ?

Thank You!

The same problem(4.26) as you, one of my header file name (Attribute.h) had changed to other names. Hope to help you