bugfix for deploying startupscripts in 2017

Author: daren-thomas

RpsRuntime/RpsExternalApplicationBase.cs

@@ -172,7 +172,9 @@ private ImageSource GetEmbeddedPng(string imageName)
         private void ExecuteStartupScript(UIControlledApplication uiControlledApplication, XDocument addinXml, Assembly addinAssembly)
         {
             // we need a UIApplication object to assign as `__revit__` in python...
-            var fi = uiControlledApplication.GetType().GetField("m_application", BindingFlags.NonPublic | BindingFlags.Instance);
+            var versionNumber = uiControlledApplication.ControlledApplication.VersionNumber;
+            var fieldName = versionNumber == "2017" ? "m_uiapplication" : "m_application";
+            var fi = uiControlledApplication.GetType().GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
             var uiApplication = (UIApplication)fi.GetValue(uiControlledApplication);
             // execute StartupScript
             var scriptName = GetStartupScriptName(addinXml);