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

[Ian Hinder]

On 14 May 2013, at 15:20, Frank Loeffler <knarf at cct.lsu.edu> wrote:

> On Tue, May 14, 2013 at 08:35:23AM +0200, Ian Hinder wrote:
>>>  (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
> 
>> Does anyone know why this happens
> 
> Something tries to interpolate the mask. Evolution shouldn't do that,
> the mask is supposed to be written each (sub-)timestep AFAIR. Now, there
> are other possibilities, as you mentioned below...
> 
>> and if there is a workaround I can use to get the run going again?
> 
> The questions is what makes Carpet interpolate, and avoid that.
> 
>> I have ADMBase::metric_timelevels set to the default, which is 1.
>> Should it be 3?
> 
> It should work with 1.
> 
>> How about changing the frequency of AHFinderDirect output to match
>> the coarsest timelevel?
> 
> I suspect that this is the cause of your problem: you output in between
> evolution times of the coarsest level, making Carpet interpolate the
> mask. You could (only for the mask probably), output only at full
> coarse level steps, if don't need it more often. You could also try
> (although here I am less sure that this will prevent interpolation) to
> restrict the output of the mask to some of the finer levels only, at
> full time steps of these.

I'm not interested in the mask, and I don't output it.  Would something still be trying to interpolate this mask?

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.einsteintoolkit.org/pipermail/users/attachments/20130514/280b79df/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 203 bytes
Desc: Message signed with OpenPGP using GPGMail
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20130514/280b79df/attachment.bin