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Python Script tool's Custom validation doesn't work as a Geoprocessing Service

Question asked by jagreen on Sep 1, 2015
Latest reply on Sep 3, 2015 by jagreen

I have a script tool for which I've written some simple custom validation that manipulates the user interface of the tool.  It basically updates the choice list in one drop-down menu based on the value the user chooses in another drop-down menu.  The tool validation works when running the GP tool in ArcGIS Desktop, but the validation doesn't work when I publish the script tool as a geoprocessing service and add it to the Geoprocessing widget within the Web AppBuilder.  From the help doc, I gather this may be a known limitation of the software?  If so, does anyone have a suggestion of how to go about implementing custom validation in a web application?  Perhaps by binding the GP service to the Geoprocessing task in the ArcGIS API for JavaScript?  Or maybe there is an easier way?