We have a few forms that autonumber themselves using the method found in this tutorial: http://www.bizsupportonline.net/browserforms/autonumber-infopath-form-submitted-sharepoint-library.htm
Problem is after updating from 2010 to 2013, we updated all the data source connections to the new form library and now the "retrieveIDs" data connection is malfunctioning. It is pulling a seemingly random ID # to set the autonumber field to, and it's either horribly out of sequence with the rest of the library or it already exists, which throws an error when submitting (since we dont allow overwrite)
Any thoughts?