Hello Frederico,
CCTK_VarIndex (example_gf[0]) --> 180 CCTK_VarIndex (example_gf[1]) --> 181
However when the index is fed to CCTK_VarDataPtrI to get a pointer to the grid function, it always points to the 0th component. To get the pointer to the component I wanted, I had to increment the pointer by the correct amount.
This not a major inconvenience, but it is quite counterintuitive. Is there a reason for such behaviour?
Sounds like a bug to me, namely I wonder what would happen if you were to pass "example_gf[1]" to say CarpetIOHDF5::out_vars.
Can you check what the results of CCTK_VarDataPtrI(cctkGH, 0, CCTK_VarIndex("example_gf[1]")) and CCTK_VarDataPtr(cctkGH, 0, "example_gf[1]") is and if they agree? At the very least I would have expected that they agree.
Yours, Roland