Checklists are so handy! You've really started using them to make sure everything's getting taken care of and you're collecting great data! You're composing one of said Checklists or editing an existing Checklist. You've added tasks and want to save your work. Suddenly, this error message appears:
What? Failed to save my Checklist? L2L is telling me I must select a valid Trade when a Dispatch Type is selected. I don't even remember selecting a Dispatch Type.
Although it may not seem like it, you did. By default, you specified a Dispatch Type when you entered numeric values, including Out of Tolerance and Reject Limits: you 'specified' a Dispatch Type by asking the system to launch a particular Dispatch Type in response to values you defined.
When creating and editing Checklists, specifying a Dispatch Type also requires selecting a Trade. And vice versa. When you create or edit a Checklist, if you've specified a Trade, you must also designate a Dispatch Type (see the screenshot below).
Now that you understand how this works, hopefully you won't run into this again in the future. But if you do, now you know what steps to take to make sure your Checklist details save as desired.