I have duplicated your results, but I am not sure it is the same issue
that is causing your problem.
I created a parent task, "Test". I created a subtask under that task
called "subtest". I next completed the parent task "Test".
When I search for "subtest" in the Outline per View All Items, Hide
Completed Tasks, and search through the search function the software
gives me the same error message "Task not found in the current outline
view. Show all tasks in outline and try to find the task again".
However, regardless of the dialog box error message, "subtest" does
how up in the search task pane.
This result makes sense to me. Even though "subtest" is not marked
completed, its parent "Test" is, and the Outline per View All Items is
a hierarchical view.
Now if I switch to the Outline per view by Created, Hide Completed
Tasks, and search, the software immediately identifies that task. This
also makes sense to me as the Created view is not a hierarchical view;
it has been "flattened" and the "subtest" task no longer shows up
under the completed parent task of "Test".
This would also explain why "subtest" does not show up in the To-Do
view as its parent has been completed.
If your parent task has not been completed, then I still would check
other properties of parents, grandparents, or other ancestors as the
properties of these tasks can affect the visibility of a specific task
in the To-Do view.
For the To-Do view, you did not specify the Action Filter or the View
you are using. If you are using the default Active Action Filter and
the Active Actions view, please state that as it will help in further
diagnosing your issue.
Ron Stockfleth