When using SharePoint workflow on a DBXL Document Type that is mapped to SharePoint, some changes are needed in DBXL’s web.config file. Please follow the steps in this document.
This document applies to the Integrated scenario, common in DBXL v2.7 and previous versions. Please refer to the DBXL v2.8 Deployment Guide for more information on DBXL v2.8 on SharePoint 2013.