Populate subject with custom field value

Hello all,

I've created a custom field (mandatory field) and the value that is chosen is assigned to the subject the email generated. When I create the ticket it works fine:

     RT_System - Subject changed from (no value) to 'Digital Recording Problem' 

 ("Digitial Recording problem" is one of the values that can be chosen)

When one of our users attempt to create a ticket they get this

     RT_System - Subject changed from (no value) to '' 

Thanks,
Gary

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