I have tried for 2 days now to get the correct URL to place into a SharePoint workflow variable. I want the item to open in the custom form located in “Update-Info.aspx” I created and set as the default for the edit display.  I’ve been using SPD to insert the lookup field for the ID, Googled it and tried several ways but I cannot seem to find the magic that will make the item open in the update form.  It is making me crazy!!

This URL opens the update form:

This URL opens the item in the display form:
opens item