#905: NaNs in ADMBase::gxx using Development Version of ET ---------------------------------+------------------------------------------ Reporter: yosef@… | Type: defect Status: new | Priority: major Milestone: | Component: Other Version: | Keywords: ---------------------------------+------------------------------------------ While testing the CCE in the ET, I stumbled across an issue interpolating the admbase::metric at CCTK_POSTSTEP in GLOBAL mode at particular spatial points.

The "bug" (or parfile/scheduling error) seems to be sensitive to the exact grid setup. Basically, when I use the qc0-mclachlan-CCE_Cauchy.par parfile, I get nans for gxx. I made a small test thorn that only interpolates gxx at a particular point. Nans show up at iteration 1.

attached is the parfile I used and the test thorn.

Here is the output from the above test thorn: gxx(3.966899,0.000000,-17.630662) = 1.1160523626974641 at iter 0 on proc 1 gxx(3.966899,0.000000,-17.630662) = 1.1160523626974641 at iter 0 on proc 0 gxx(3.966899,0.000000,-17.630662) = -nan at iter 8 on proc 1 gxx(3.966899,0.000000,-17.630662) = -nan at iter 8 on proc 0 gxx(3.966899,0.000000,-17.630662) = -nan at iter 16 on proc 1 gxx(3.966899,0.000000,-17.630662) = -nan at iter 16 on proc 0

etc....