Validate file attachments or image upload on save

There are two variables available to have the attached or image field values in comma separated string. 

Axp_AttachedFiles - is a variable that will contain the list of files (header attachments) attached as comma separated string.

Axp_LoadedImages - is a variable that will contain image fields as comma separated string.

Using which, a validate expression can be defined as shown below...

iif((Axp_loadedimages # {}) & (Axp_attachedfiles#{}), {T}, {File/image is not loaded})

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