https://community.esri.com/t5/arcgis-pro-questions/source-fields-list-intermittently-blank-in-append/m-p/1205880#M59006 <P>I am using the Append tool in ArcGIS Pro 3.0.1, and am experiencing an intermittent issue when using the field map to reconcile field differences. The issue is that when selecting a field from the left hand&nbsp;<STRONG>Output Fields</STRONG> menu, and then selecting&nbsp;<STRONG>Add New Source</STRONG> from the right hand Source menu, the drop down&nbsp;<STRONG>Add New Source</STRONG> Fields list is sometimes blank. See the image below for an example of the blank Fields list. Other times, it is correctly populated with the Fields from the Input Dataset. I am not changing anything between the Fields list being visible or not.</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="DataOfficer_0-1661354784924.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/49312i6CE238AB98BBCBAB/image-size/medium?v=v2&amp;px=400" role="button" title="DataOfficer_0-1661354784924.png" alt="DataOfficer_0-1661354784924.png" /></span></P><P>&nbsp;</P> Wed, 24 Aug 2022 15:27:48 GMT DataOfficer 2022-08-24T15:27:48Z https://community.esri.com/t5/arcgis-pro-questions/source-fields-list-intermittently-blank-in-append/m-p/1205880#M59006 <P>I am using the Append tool in ArcGIS Pro 3.0.1, and am experiencing an intermittent issue when using the field map to reconcile field differences. The issue is that when selecting a field from the left hand&nbsp;<STRONG>Output Fields</STRONG> menu, and then selecting&nbsp;<STRONG>Add New Source</STRONG> from the right hand Source menu, the drop down&nbsp;<STRONG>Add New Source</STRONG> Fields list is sometimes blank. See the image below for an example of the blank Fields list. Other times, it is correctly populated with the Fields from the Input Dataset. I am not changing anything between the Fields list being visible or not.</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="DataOfficer_0-1661354784924.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/49312i6CE238AB98BBCBAB/image-size/medium?v=v2&amp;px=400" role="button" title="DataOfficer_0-1661354784924.png" alt="DataOfficer_0-1661354784924.png" /></span></P><P>&nbsp;</P> Wed, 24 Aug 2022 15:27:48 GMT https://community.esri.com/t5/arcgis-pro-questions/source-fields-list-intermittently-blank-in-append/m-p/1205880#M59006 DataOfficer 2022-08-24T15:27:48Z