I've followed this tutorial for creating and customising forms for external data (http://blogs.msdn.com/infopath/archive/2010/03/11/customize-an-external-list-form-in-infopath-2010.aspx).
The only difference being that my seconday data source is not an XML file (I've tried database connection and existing sharepoint lists both internal and external)
When running the design checker I get the message "Additional Data connections not supported" and my form won't publish. Any ideas?
View Complete Post