Reference Page Does not appear, it just says NaN

[Juanzitooh]

I've been having an error for days, when putting a line as a reference.

In my case it is the Client line as Ref, the system generates a virtual column in the Remittances database, but when I look at the reference... no results appear and the title remains NAN, can anyone help me?

[AleksiAlkio]

Please take a printscreen from that view so we could be sure what you are looking for,  thanks.