I want to create a ContextMenuListRange in VSTO where I have already created one more xml for ContextMenuCell. If I add the List Range in one more tag, the Ribbon is saying "Object Reference not set to instance of an object. Here is the xml tag
<contextMenus>
<contextMenu idMso="ContextMenuCell">
<menu id="MySubMenu" label="Visualization">
<button id="contextBtn2" getEnabled="GetEnabled" getLabel="GetLabel" image="2Image" onAction="Part2Vis_Click"/>
<button id="contextBtn3" getEnabled="GetEnabled" getLabel="GetLabel" image="3Image" onAction="Part3Vis_Click"/>
<button id="contextBtn3Mod" getEnabled="GetEnabled" getLabel="GetLabel" image="3Module" onAction="Module3Vis_Click"/>
<button id="contextBtnAdv" getLabel="GetLabel" onAction="BtnAdvClick" image="advImage"/>
<button id="contextBtnOption" getLabel="GetLabel" onAction="BtnOptionClick" image="Settings"/>
<button id="contextBtnHelpPage" getLabel="GetLabel" onAction="BtnHelpPageClick" image="Help"/>
</menu>
</contextMenu>
</contextMenus>
<contextMenus>
<contextMenu idMso="ContextMenuListRange">
<menu id="MyContextNew" label="Visualization">
<button id="contextBtn2d" getEnabled="GetEnabled" getLabel="GetLabel" image="2dImage" onAction="Part2DVis_Click"/>
<button id="contextBtn3d" getEnabled="GetEnabled" getLabel="GetLabel" image="3dImage" onAction="Part3DVis_Click"/>
<button id="contextBtn3dMod" getEnabled="GetEnabled" getLabel="GetLabel" image="3DModule" onAction="Module3DVis_Click"/>
<button id="contextBtnAdv" getLabel="GetLabel" onAction="BtnAdvClick" image="advImage"/>
<button id="contextBtnOption" getLabel="GetLabel" onAction="BtnOptionClick" image="Settings"/>
<button id="contextBtnHelpPage" getLabel="GetLabel" onAction="BtnHelpPageClick" image="Help"/>
</menu>
</contextMenu>