[Carpet] Carpet asserts

[Erik Schnetter]

On May 26, 2006, at 06:06:40, Wolfgang Kastaun wrote:

> Hi !
> Suddenly I got these assertions:
>
> cactus_tov_opteron: /net/hydra/home/kastaun/wd/cactus/latest/ 
> configs/tov_opteron/build/
> Carpet/Recompose.cc:763: void Carpet::SplitRegions_Automatic(const  
> cGH*, std::vector<ib
> box, std::allocator<ibbox> >&, std::vector<bbvect,  
> std::allocator<bbvect> >&, std::vect
> or<int, std::allocator<int> >&): Assertion `abs(prod(rshape) -  
> nprocs) < 1e-6' failed.
> cactus_tov_opteron: /net/hydra/home/kastaun/wd/cactus/latest/ 
> configs/tov_opteron/build/
> Carpet/Recompose.cc:763: void Carpet::SplitRegions_Automatic(const  
> cGH*, std::vector<ib
> box, std::allocator<ibbox> >&, std::vector<bbvect,  
> std::allocator<bbvect> >&, std::vect
> or<int, std::allocator<int> >&): Assertion `abs(prod(rshape) -  
> nprocs) < 1e-6' failed.
>
> What does it mean ?
>
> This was a 8-cpu run, the executable worked fine before in an  
> almost identical setup
> (only the resolution did change).

These lines check whether the processor decomposition is consistent.   
The result should be integer, but the calculation is done using  
floating point numbers, and the fudge factor 1.0e-6 is supposed to  
allow for floating point roundoff.  This check is not supposed to  
fail for any user input.

It would be interesting to know the specific values of these  
variables.  Can you print them to the screen, or in a debugger, or  
send me the parameter file (preferably with bugzilla)?

-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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