Frequently asked questions

To create Schedules, DC-Maestro needs to communicate with a DataChain Instance.
If no DataChain Instance is available from the Instances list, a user with the DC-Maestro administrator role must reference the DataChain Instance(s) used by the company.

If an Instance is already selected, it is possible that it is not available (lost synchronization) or that it is unreachable (wrong Instance settings).
In this case, go back to the Instances list and select a reachable Instance or contact a DC-Maestro administrator to inform him/her of the problem encountered.

If you are not the Owner or contributor of the Schedule, you cannot add tasks.

If you have any of these roles, it is possible that the selected Instance is not available or unreachable.
In this case, it is possible to view the existing Schedules, but it is not possible to add DataChain tasks.
Go back to the list of Instances and select a reachable Instance or contact a DC-Maestro administrator if the problem persists.

Several problems may be encountered * the DataChain Instance is inaccessible: it may be in the process of being updated. If this is not the case, contact a DataChain Administrator to find out more. * the Project has expired or been deleted: go to the Project page from DC-Core to find out more. * the item has been deleted: go to the list of items from DC-Core to find out more. You can also search for the deletion of an item in the action history from DataChain-Core. * you do not have sufficient rights to the item: contact a user with sufficient rights to the item so that they can check your rights.

To ensure full traceability on actions performed via DC-Maestro, task execution relies on user rights in DataChain.

You must therefore be a member of the Project in which you wish to Schedule and execute tasks.

To be added to a Project, contact a DataChain Project Manager.

Sometimes synchronisation problems with DataChainCore block the correct update of running tasks (particularly when updating Instances).

To overcome this problem, you can make a stop request by clicking on the btn:[STOP] icon visible when a Schedule is running.
It may happen that stopping is not possible at a given moment and that the request is unsuccessful.
In this case, click btn:[STOP] again to try again.

DC-Maestro includes a function that calculates an optimal execution chain for updating the output elements of a Project.
We recommend using this functionality to automatically generate the task pipeline.

Each schedule has a unique objective. To build an optimal pipeline manually, it is essential to have a good knowledge of the data available in DataChain to meet this specific need.

If a DataChain Instance contains Schedules that have already been executed, it is not possible to dereference it.

From a Schedule’s run list or history, click on the task status icon to display the run log page.
A lot of information is displayed to help you understand how to solve the problem.
Most of the time, either the rights or permissions of the Owner block the correct execution of the tasks, or the DataChain elements have been deleted.