I have been getting this error all the time since the first software update in the spring. This usually after I have been using the in DB tools and after I have already run something using those in DB tools.
I don't know if this is a bug or if this is something with the system I am working in.
All I know, is that anytime I get this error, I have to close out of alteryx completely and re-open it to get it working again.
Jeff