topic Re: Error code:400 &quot;Unable to complete operation&quot; in ArcGIS Runtime SDK for iOS Questions https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/error-code-400-amp-amp-amp-quot-unable-to-complete/m-p/693285#M6160 <HTML><HEAD></HEAD><BODY><SPAN>The problem was that I was using a versioned database. Once I removed the version all worked again!</SPAN></BODY></HTML> Thu, 23 Jan 2014 05:49:17 GMT NicoleDe_La_Feld 2014-01-23T05:49:17Z Error code:400 &amp;amp;quot;Unable to complete operation&amp;amp;quot; https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/error-code-400-amp-amp-amp-quot-unable-to-complete/m-p/693284#M6159 <HTML><HEAD></HEAD><BODY><SPAN>I am developing an iOS Application for collecting data following "FeatureLayerEditingSample"(you can find it here: </SPAN><A class="jive-link-external-small" href="https://www.arcgis.com/home/item.htm...b22240b6975918" rel="nofollow" target="_blank">https://www.arcgis.com/home/item.htm...b22240b6975918</A><SPAN>).</SPAN><BR /><SPAN>I use Esri's iOS sdk version 10.2</SPAN><BR /><SPAN>This error occurs random sampling when I try to add a new feature (simple or with attachments) to my feature layer. Moreover sometimes only one or two specific attachments cannot be sync and the error says "because unable to complete operation". Any ideas?</SPAN></BODY></HTML> Wed, 04 Dec 2013 05:53:33 GMT https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/error-code-400-amp-amp-amp-quot-unable-to-complete/m-p/693284#M6159 NicoleDe_La_Feld 2013-12-04T05:53:33Z Re: Error code:400 "Unable to complete operation" https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/error-code-400-amp-amp-amp-quot-unable-to-complete/m-p/693285#M6160 <HTML><HEAD></HEAD><BODY><SPAN>The problem was that I was using a versioned database. Once I removed the version all worked again!</SPAN></BODY></HTML> Thu, 23 Jan 2014 05:49:17 GMT https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/error-code-400-amp-amp-amp-quot-unable-to-complete/m-p/693285#M6160 NicoleDe_La_Feld 2014-01-23T05:49:17Z