Good morning, Samuel,
You can definitely bring them up to date. However, I can't guarantee that will resolve their issue as I have no other confirmed reports of this error.
You say it only occurs while running DIC and only in Invoices. Knowing how far DIC gets before it throws the error could be useful. And, I'm pretty sure I'll need the data that the error is thrown on. You could upload it our dbr site and flag it for Tech Support.
When did this error start to occur? That release is a year and a half old so I'm thinking it wasn't always happening.
I'll keep my eyes open for the data.
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Regards,
Softrak Tech Support