Hey @Sharon Brown! Funny enough, I actually used to work at Fivetran, and lately I’ve been working with a lot of NetSuite users and automating data workflows. So yes, I have pretty extensive experience exporting data into NetSuite. I’ve done it through custom API scripts and through Fivetran’s Activations feature.
I know they recently acquired Census and made it Activations, so I'm sure the are still working out the kinks on the integrations. When I used it, it worked great. If you want the exact errors you’re seeing and I can take a look to see if there’s a simple fix.