Comment (by Roland Haas):

Hello Qingwen Wang,

I see. So it likely is not exactly this issue, though any other grid function that gets interpolated in time (due to eg Scalar or Basic output or interpolation in space) can trigger the same error message. Without more information it is impossible to say which variable it is. You may even have to find out where Carpet / CarpetLib call get_time and add some debug output to report which variables it tries to access (get_time no longer knows, though it may be useful to pass in this information just for more detailed error messages).

Yours,
Roland

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2433/resubmit-failed-to-run