Changes (by Roland Haas):

Sometimes it is useful to set a grid function that does not evolve at all. However, using a single timelevel and tag 'prolongation="copy"' results in a Carpet assertion failure.

This is fixed in the following commit [d13a6e245a3d7d2b575094fd0def540d510a166c](https://bitbucket.org/eschnett/carpet/commits/d13a6e245a3d7d2b575094fd0def540d510a166c)), as discussed in the following thread: http://lists.einsteintoolkit.org/pipermail/users/2017-October/005835.html

Could this be merged to master?

Keyword:

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2086/perform-only-spatial-prolongation-when