topic Optional versus Required GP Parameters for Python Script Tool in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/optional-versus-required-gp-parameters-for-python/m-p/575058#M18982 <HTML><HEAD></HEAD><BODY><SPAN>I published a Python script tool as a GP service in ArcServer.&nbsp; This script has a number of parameters (17 at the moment and possibly more as time goes by).&nbsp; Only two parameters are required.&nbsp; However, when I call the GPService from Silverlight (in C#), I have to specify ALL of the parameters, even the "optional" ones.&nbsp; If I do not pass a value for ALL parameters, the task fails with "ESRI.ArcGIS.Client.Tasks.ServiceException: Error Submitting Job."&nbsp; If I do pass a value for each parameter, the job runs fine.</SPAN><BR /><BR /><SPAN>Here's my issue: This service will be called from many Silverlight/ArcServer apps, and I would like to be able to add another optional parameter without breaking every app that calls the service.&nbsp; By adding a parameter, I will be effectively requiring each developer to republish their code to include a parameter their app probably doesn't care about.</SPAN><BR /><BR /><SPAN>Do I misunderstand the significance of setting a parameter to Optional versus Required?</SPAN><BR /><BR /><SPAN>(I will also post this in the Silverlight forum.)</SPAN><BR /><BR /><SPAN>Thanks for any advice/suggestions.</SPAN></BODY></HTML> Wed, 10 Aug 2011 15:37:51 GMT RussCoffey 2011-08-10T15:37:51Z Optional versus Required GP Parameters for Python Script Tool https://community.esri.com/t5/geoprocessing-questions/optional-versus-required-gp-parameters-for-python/m-p/575058#M18982 <HTML><HEAD></HEAD><BODY><SPAN>I published a Python script tool as a GP service in ArcServer.&nbsp; This script has a number of parameters (17 at the moment and possibly more as time goes by).&nbsp; Only two parameters are required.&nbsp; However, when I call the GPService from Silverlight (in C#), I have to specify ALL of the parameters, even the "optional" ones.&nbsp; If I do not pass a value for ALL parameters, the task fails with "ESRI.ArcGIS.Client.Tasks.ServiceException: Error Submitting Job."&nbsp; If I do pass a value for each parameter, the job runs fine.</SPAN><BR /><BR /><SPAN>Here's my issue: This service will be called from many Silverlight/ArcServer apps, and I would like to be able to add another optional parameter without breaking every app that calls the service.&nbsp; By adding a parameter, I will be effectively requiring each developer to republish their code to include a parameter their app probably doesn't care about.</SPAN><BR /><BR /><SPAN>Do I misunderstand the significance of setting a parameter to Optional versus Required?</SPAN><BR /><BR /><SPAN>(I will also post this in the Silverlight forum.)</SPAN><BR /><BR /><SPAN>Thanks for any advice/suggestions.</SPAN></BODY></HTML> Wed, 10 Aug 2011 15:37:51 GMT https://community.esri.com/t5/geoprocessing-questions/optional-versus-required-gp-parameters-for-python/m-p/575058#M18982 RussCoffey 2011-08-10T15:37:51Z