Run a flow

Select

‘Run a flow’ works the same as (Run a model). First, select a Flow…

Look for models to load

TRAC then builds the UI that you need to finish setting up the Job.

Set-up

Clicking ‘Show chain’ expands a list of the Models which make up the Flow.

If more than one Model matches the criteria for use in the Flow, the most recent version is selected. This can be manually changed by clicking ‘Change version’.

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Moving down the page, the default values of any parameters are pre-populated as are the data inputs.

If TRAC couldn’t find a Data object which meets the Flow’s requirements you see an error message. If multiple options are found the most recent is selected, but you select an alternate via the drop-down.

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If you’ve finished making changes, click ‘Review’ to see a final breakdown of what will be in the Job.

Review & launch

Clicking ‘View full info’ brings up the full details of the Flow that will be used, including visualisation

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You can also access the object summaries for each Model and Data input via their ‘More info’ buttons and explore the input data sets.

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If it all looks correct, populate the general attributes and click ‘Run’.

The tag field is an optional piece of metadata you can assign to all the Job’s outputs, to make them more easily identifiable.

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Once you see the green confirmation message, head to the (Find a job) page where (hopefully) it will already be shown as ‘succeeded’.

If there is an issue with the Job set-up you will see a red message instead.

Look for models to load

The most common issues are missing attribute information (like the image above), or mis-aligned schemas on some of the selected objects.