topic Using geoprocessing services with precondition boolean in ArcGIS Online in ArcGIS Online Questions https://community.esri.com/t5/arcgis-online-questions/using-geoprocessing-services-with-precondition/m-p/411996#M20634 <HTML><HEAD></HEAD><BODY><P>I have a model where I have a basic if-else need. The second half of my model I don't want to run if a condition is not met. This is based on whether a piece of data has any records or not. I have simply added a get count and then calculate value based on the get count result. There are then 2 tools that have a precondition on the result of the calculate value.&nbsp;</P><P></P><P>The tool runs fine if the condition is or isn't met. I want to use the tool in the web app builder so have run the tool with the condition met, published as a geoprocessing service and put into a geoprocessing app in the web app builder. The tool runs fine if the condition is met but if it isn't, the tool fails (see below image).</P><P></P><P>Is there a way I can get the tool to finish gracefully if the condition is not met? Can you use preconditions like these in a <SPAN>geoprocessing </SPAN>service?&nbsp;</P><P></P><P>The user will not know if the condition will be met when running the process so both scenarios could be correct and I want the tool to work gracefully either way.&nbsp;</P><P></P><P><IMG alt="" class="image-1 jive-image j-img-original" src="https://community.esri.com/legacyfs/online/252660_ErrorArcGISOnline.png" style="height: auto;" />##</P></BODY></HTML> Thu, 27 Oct 2016 08:28:04 GMT JamesWellington 2016-10-27T08:28:04Z Using geoprocessing services with precondition boolean in ArcGIS Online https://community.esri.com/t5/arcgis-online-questions/using-geoprocessing-services-with-precondition/m-p/411996#M20634 <HTML><HEAD></HEAD><BODY><P>I have a model where I have a basic if-else need. The second half of my model I don't want to run if a condition is not met. This is based on whether a piece of data has any records or not. I have simply added a get count and then calculate value based on the get count result. There are then 2 tools that have a precondition on the result of the calculate value.&nbsp;</P><P></P><P>The tool runs fine if the condition is or isn't met. I want to use the tool in the web app builder so have run the tool with the condition met, published as a geoprocessing service and put into a geoprocessing app in the web app builder. The tool runs fine if the condition is met but if it isn't, the tool fails (see below image).</P><P></P><P>Is there a way I can get the tool to finish gracefully if the condition is not met? Can you use preconditions like these in a <SPAN>geoprocessing </SPAN>service?&nbsp;</P><P></P><P>The user will not know if the condition will be met when running the process so both scenarios could be correct and I want the tool to work gracefully either way.&nbsp;</P><P></P><P><IMG alt="" class="image-1 jive-image j-img-original" src="https://community.esri.com/legacyfs/online/252660_ErrorArcGISOnline.png" style="height: auto;" />##</P></BODY></HTML> Thu, 27 Oct 2016 08:28:04 GMT https://community.esri.com/t5/arcgis-online-questions/using-geoprocessing-services-with-precondition/m-p/411996#M20634 JamesWellington 2016-10-27T08:28:04Z