Parts doesn't return to invoice in Repco - Error on screen

Technical SupportUpdated 23 Sep 20261 min read

If you order parts through the Repco integration and they do not come back onto the invoice, or you see an error on screen, this article explains the usual causes and how to fix them.

Issue: You have pressed "Return Parts" in Repco, and you get a white screen with the following error, or something similar: {"message":"undefined method `downcase' for nil:NilClass","type":"R","field_errors":""} Resolution: You need to have both a MAKE and a MODEL on your vehicles in Workshop Software before you enter Navigator Pro.

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