[Carpet] carpet error message while recovering

[Erik Schnetter]

On May 14, 2007, at 08:38:16, Luca Baiotti wrote:

> Hi,
>
> has anyone seen a similar error while recovering from checkpoint, with
> the development version of carpet?
>
>
> WARNING level 0 in thorn CarpetLib processor 14 host ic0068
>    (line 1728 of
> /data1/baiotti/Cactus/configs/carpet_devel/build/CarpetLib/data.cc):
>    -> Internal error: extrapolation in time.  time=0  times= 
> [246,245,244]
>
>
>
> The same parfile and executable runs fine if the checkpoint is not
> present (i.e. from initial data).

This is a problem in the development version of Carpet.  When  
checkpointing, it does not save the current times of the individual  
refinement levels.  These times are then wrong until the first time  
step after recovery begins.  In particular, the time bins  
post_recover_variables and analysis (and potentially postregrid) are  
executed with the current time set wrong.

Béla mentioned that this problem does not occur in the stable  
version.  It is not trivial to correct, since additional information  
needs to be stored into and read from checkpoint files.  Béla also  
mentioned that he had a simple work-around, namely just disabling the  
error message above.

I have an experimental version of Carpet which has this error  
corrected; you are welcome to try it.  Alternatively, you could  
continue to use the older version of Carpet which worked for you  
until this error has been corrected.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

My email is as private as my paper mail.  I therefore support encrypting
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