Data source failing with MID server not found error Issue When testing a data source involving the MID server, the following error message is displayed: "com.glide.db.impex.datasource.DataSourceException: MID server not found: XXXXX".ReleaseApplicable to all the active data sources set up in an instanceCauseThe reported error usually happens when an invalid MID server is used with the data source. You can confirm this by clicking on show XML for the affected data source, checking the value of the "mid_server display_value" field, and using the sys_id to see if the MID server exists in the affected instance. As shown in the attached screenshot, a value is mapped to the "mid_server display_value," but technically, this MID server does not exist in the instance. Also, when you preview the associated MID server from the data source in the UI, you might see the "No preview available" message, which indicates that the MID server record does not exist in the instance. ResolutionUpdate the impacted data source with an active/valid MID server from the available list of MID servers set up in an instance.