Trying to set up a custom action for a library to send querystring parameters to a NewForm on another list using the Navigate to URL option.
Without a querystring value the link works; displays NewForm:
https:///Lists/Tasks/NewForm.aspx
With a querystring value the link does not work; displays Page Not Found:
https:///Lists/Tasks/NewForm.aspx?SelectedItemId={SelectedItemId}
Manually typing the following in the address bar works; displays NewForm:
https:///Lists/Tasks/NewForm.aspx?SelectedItemId=123
https:///Lists/Tasks/NewForm.aspx?SelectedItemId=
https:///Lists/Tasks/NewForm.aspx?abc=123
Why would manually typing in these paths work, but from the Context Menu results in Page Not Found?