how to insert a custom button into a esri core group?

[nadja]

I've found this docu: https://www.esri.com/content/dam/esrisites/en-us/events/conferences/2020/federal-gis/arcgis-pro-sdk-... and tried to adapt it, so that my custom button which opens my dockpane not only appears in a separate add-in tab, but also in the Ribbon under Insert >> Project. I copied the corresponding command ids. But it's not working. any ideas why? do i need special options?

	<modules>
		<insertModule id="My_Module" className="Module1" autoLoad="true" caption="Module1">
			<tabs>
				<tab id="My_Tab1" caption="MyTab" keytip="D">
					<group refID="My_Group1"/>
				</tab>
			</tabs>
			<groups>
				<group id="My_Group1" caption="MyGroup" appearsOnAddInTab="false" keytip="MyGroup">
					<button refID="My_Dockpane1_ShowButton" size="large"/>
				</group>
			</groups>
			<controls>
				<button id="My_Dockpane1_ShowButton" caption="My Button" keytip="My Button" className="Dockpane1_ShowButton" loadOnClick="true" smallImage="pack://application:,,,/xy;component/Images/icon_small.png" largeImage="pack://application:,,,/xy;component/Images/icon_large.png">
					<tooltip heading="Show">
						Show<disabledText />
					</tooltip>
				</button>
			</controls>
			<dockPanes>
				<dockPane id="My_Dockpane1" caption="My Dockpane" className="Dockpane1ViewModel" dock="group" dockWith="esri_core_projectDockPane" isDropTarget="false">
					<content className="Dockpane1View" />
				</dockPane>
			</dockPanes>
		</insertModule>

		<updateModule refID="esri_core_insertTab">
			<groups>
				<updateGroup refID="esri_core_projectData">
										<insertButton refID="My_Dockpane1_ShowButton"/>
				</updateGroup>
			</groups>
		</updateModule>

	</modules>

[UmaHarano · Accepted solution]

@nadja 

Pro "module" to update is "esri_core_module"  This is the module that creates the "Insert" tab on the Ribbon with the "Project" group.

So in your DAML (line 27), use this: 

<updateModule refID="esri_core_module">

instead of <updateModule refID="esri_core_insertTab">

[nadja]

Thank you, it worked 😄