https://community.esri.com/t5/arcgis-pro-sdk-questions/error-message-when-opening-a-custom-tool-through/m-p/1676822#M13353 <P>Hi <a href="https://community.esri.com/t5/user/viewprofilepage/user-id/844720">@Gfreitag</a>&nbsp;,</P><P>Do you have any mapping items configured to open in the step other than the Pro command? This sounds similar to an issue we fixed in Pro 3.5 where "Step Failed" is shown with the error "Unable to open all items" when the step is configured with no mapping items to open.</P><P>Is it possible to upgrade to Pro 3.5? If not, you will need to configure the step to open one other mapping item (map, scene, layout, task).</P><P>Please let us know if you have any other questions.</P><P>Thank you.</P><P>&nbsp;</P><P>&nbsp;</P> Thu, 08 Jan 2026 18:07:54 GMT LLam 2026-01-08T18:07:54Z https://community.esri.com/t5/arcgis-pro-sdk-questions/error-message-when-opening-a-custom-tool-through/m-p/1676217#M13346 <P>Hello,</P><P>I'm having an issue with regards to interaction between Workflow Manager and a custom ArcGIS Pro SDK addin. I have a wizard that I want to open when I run a workflow step. This wizard is opened through a button in the UI. When I execute the&nbsp;<SPAN>ArcGIS Pro Mapping Step in my workflow with the</SPAN>&nbsp;<SPAN>Run ArcGIS Pro Command option toggled, and provide the id of the button linked to the wizard, the step correctly runs and opens the wizard. The problem is, it also adds a "step failed" flag to the job, even on successfully opening the wizard. This causes issues because a user could be confused and think the step had not properly completed.</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Gfreitag_0-1767740898471.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/146365i225A0D889E8A0702/image-size/medium?v=v2&amp;px=400" role="button" title="Gfreitag_0-1767740898471.png" alt="Gfreitag_0-1767740898471.png" /></span></P><P>I've already referenced and implemented suggestions from these threads (<A href="https://community.esri.com/t5/arcgis-pro-sdk-questions/solved-cannot-run-a-custom-arcgis-pro-command-in-a/m-p/1413834#M11402" target="_self">here</A>&nbsp;and <A href="https://community.esri.com/t5/arcgis-workflow-manager-questions/workflow-manager-run-custom-arcgis-pro-command/td-p/1378931" target="_self">here</A>&nbsp;), and they don't seem to help with this particular issue, although they did help with getting the wizard to open. Is there some setting in Workflow Manager I'm missing, some other method I should be extending in Module, or anything else I could try to resolve the issue? Insight as to why Workflow Manager could flag a step to fail would also help.</P><P>Thanks in advance for any help.</P> Tue, 06 Jan 2026 23:14:12 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/error-message-when-opening-a-custom-tool-through/m-p/1676217#M13346 Gfreitag 2026-01-06T23:14:12Z https://community.esri.com/t5/arcgis-pro-sdk-questions/error-message-when-opening-a-custom-tool-through/m-p/1676822#M13353 <P>Hi <a href="https://community.esri.com/t5/user/viewprofilepage/user-id/844720">@Gfreitag</a>&nbsp;,</P><P>Do you have any mapping items configured to open in the step other than the Pro command? This sounds similar to an issue we fixed in Pro 3.5 where "Step Failed" is shown with the error "Unable to open all items" when the step is configured with no mapping items to open.</P><P>Is it possible to upgrade to Pro 3.5? If not, you will need to configure the step to open one other mapping item (map, scene, layout, task).</P><P>Please let us know if you have any other questions.</P><P>Thank you.</P><P>&nbsp;</P><P>&nbsp;</P> Thu, 08 Jan 2026 18:07:54 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/error-message-when-opening-a-custom-tool-through/m-p/1676822#M13353 LLam 2026-01-08T18:07:54Z