[Users] Grid function "AHFINDERDIRECT::ahmask" has only 1 active time levels on refinement level 1; this is not enough for time interpolation

[Ian Hinder]

Hi,

I am getting the following error in a BBH simulation just before the merger:

> WARNING level 0 in thorn CarpetInterp processor 33 host c438-302.stampede.tacc.utexas.edu
>   (line 1698 of /work/00915/hinder/Cactus/AEI/arrangements/Carpet/CarpetInterp/src/interp.cc): 
>   -> Grid function "AHFINDERDIRECT::ahmask" has only 1 active time levels on refinement level 1; this is not enough for time interpolation
> cactus_sim: /work/00915/hinder/Cactus/AEI/arrangements/Carpet/Carpet/src/helpers.cc:314: int Carpet::Abort(const _cGH *, int): Assertion `0' failed.

Does anyone know why this happens, and if there is a workaround I can use to get the run going again? Different resolutions of this run, as well as other runs with similar parameter files, have worked fine.  It looks like an edge case.  I am using the trunk ET from 16-Apr-2013.

Relevant tickets:

	https://trac.einsteintoolkit.org/ticket/237 (closed)
	https://trac.einsteintoolkit.org/ticket/380 (still open)

I have ADMBase::metric_timelevels set to the default, which is 1.  Should it be 3?  Would it work to recover with this parameter set to 3?  The parameter claims to be steerable, though I don't know what it would use for the previously nonexistent timelevels.

How about changing the frequency of AHFinderDirect output to match the coarsest timelevel?

-- 
Ian Hinder
http://numrel.aei.mpg.de/people/hinder

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