Thank you for the suggestion. I cleared browser cache, no change.
I made a copy of the survey; same issue occurred. So I tried deleting that question that was triggering the "error" and when tried saving/previewing/publishing it displayed the same error message, this time pointing to a different question, which also has not been edited/changed in anyway since last editing/publishing successfully. Any other recommendations? Is this just a bug?
Thank you very much for your time.
Liz