Hi all, 

I'm trying to use the thorn Extract, but I'm encountering an issue with prolongation in Carpet. 

I can use it successfully (i.e. getting the output files .ul, .tl) with the provided test parfile in 

repos/einsteinanalysis/Extract/test/qc0-mclachlan.par


However this has


CarpetRegrid2::num_levels_1         =  1

CarpetRegrid2::num_levels_2         =  1


which is not very useful. If I try to increase the levels to say 


CarpetRegrid2::num_levels_1         =  2

CarpetRegrid2::num_levels_2         =  2


I get the error


ERROR from host lhcb02.icc.ub.edu process 0

  while executing schedule bin CCTK_POSTSTEP, routine Extract::Extract

  in thorn CarpetLib, file /home/tandrade/Cactus/configs/sim/build/CarpetLib/ggf.cc:376:


  -> The variable "EXTRACT::temp3d" has only 1 active time levels, which is not enough for boundary prolongation of order 2 


Similarly, if I activate the thorn and request the output using other parfiles for binary black holes, I get a similar warning (not error) and the code produces no output. 


any advice?


thank you!

Tomas





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