https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/upload-shapefile-error-cannot-read-property-of/m-p/1071523#M14534 <P>js 3.36</P><P>Attempting to implement the <A href="https://developers.arcgis.com/javascript/3/jssamples/portal_addshapefile.html" target="_self">upload shapefile example</A> into a new custom widget but having an issue on the first attempt (subsequent attempts using a different .zip name works as expected).&nbsp; Basically on the request({load:}) property it errors with "TypeError: Cannot read property of name of undefined at <A href="https://js.arcigs.com..." target="_blank">https://js.arcigs.com...</A>. and just goes to the errorHandler.</P><LI-CODE lang="javascript">//use the rest generate operation to generate a feature collection from the zipped shapefile. request({ url: this.portalUrl + '/sharing/rest/content/features/generate', content: myContent, form: dom.byId('uploadForm'), handleAs: 'json', load: lang.hitch(this, function (response) { if (response.error) { console.log("response.error: ", response.error); this.errorHandler(response.error); return; } var layerName = response.featureCollection.layers[0].layerDefinition.name; dom.byId('upload-status').innerHTML = '&lt;b&gt;Loaded: &lt;/b&gt;' + layerName; this.addShapefileToScratch(response.featureCollection); document.getElementById("inFile").innerHTML = ''; }), error: lang.hitch(this, this.errorHandler) }, { usePost: 'true' }); }, errorHandler: function (error) { dom.byId('upload-status').innerHTML = "&lt;p style='color:red'&gt;" + error.message + "&lt;/p&gt;"; console.log("errorHandler: ", error.message) document.getElementById("inFile").innerHTML = ''; },</LI-CODE><P>&nbsp;</P> Wed, 23 Jun 2021 15:31:04 GMT JamesCrandall 2021-06-23T15:31:04Z https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/upload-shapefile-error-cannot-read-property-of/m-p/1071523#M14534 <P>js 3.36</P><P>Attempting to implement the <A href="https://developers.arcgis.com/javascript/3/jssamples/portal_addshapefile.html" target="_self">upload shapefile example</A> into a new custom widget but having an issue on the first attempt (subsequent attempts using a different .zip name works as expected).&nbsp; Basically on the request({load:}) property it errors with "TypeError: Cannot read property of name of undefined at <A href="https://js.arcigs.com..." target="_blank">https://js.arcigs.com...</A>. and just goes to the errorHandler.</P><LI-CODE lang="javascript">//use the rest generate operation to generate a feature collection from the zipped shapefile. request({ url: this.portalUrl + '/sharing/rest/content/features/generate', content: myContent, form: dom.byId('uploadForm'), handleAs: 'json', load: lang.hitch(this, function (response) { if (response.error) { console.log("response.error: ", response.error); this.errorHandler(response.error); return; } var layerName = response.featureCollection.layers[0].layerDefinition.name; dom.byId('upload-status').innerHTML = '&lt;b&gt;Loaded: &lt;/b&gt;' + layerName; this.addShapefileToScratch(response.featureCollection); document.getElementById("inFile").innerHTML = ''; }), error: lang.hitch(this, this.errorHandler) }, { usePost: 'true' }); }, errorHandler: function (error) { dom.byId('upload-status').innerHTML = "&lt;p style='color:red'&gt;" + error.message + "&lt;/p&gt;"; console.log("errorHandler: ", error.message) document.getElementById("inFile").innerHTML = ''; },</LI-CODE><P>&nbsp;</P> Wed, 23 Jun 2021 15:31:04 GMT https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/upload-shapefile-error-cannot-read-property-of/m-p/1071523#M14534 JamesCrandall 2021-06-23T15:31:04Z