Welcome to the Sage 500 Support Group on Community Hub! Available 24/7, the Forums are a great place to ask and answer product questions, as well as share tips and tricks with Sage peers, partners, and pros.
I've seen issues like this when you open an existing data porter file to import data rather than creating a new mapping in excel. We have a defect already reported on this: Issue ID 49445
Knowledgebase - Article 42269 - "Import task does not launch…