Thanks, Satish. Danyang
On 2020-06-05, 2:11 PM, "Satish Balay" <ba...@mcs.anl.gov> wrote: VecGetArray() is for F77 - it relies on out-of-bound access. The safer call is VecGetArrayF90() Now that PETSc requires F90 - perhaps VecGetArray() should be deprecated [and all examples fixed to use VecGetArrayF90].. Satish On Fri, 5 Jun 2020, Danyang Su wrote: > Hi All, > > > > I have a question regarding the following example. > > https://www.mcs.anl.gov/petsc/petsc-current/src/ksp/ksp/tutorials/ex14f.F90.html > > > > > > When debug flags are used in the make file, the code crashed with following error. > > > > At line 335 of file ex14f.F90 > > Fortran runtime error: Index '-14450582413' of dimension 1 of array 'xx' below lower bound of 1 > > > > FFLAGS = -g -fcheck=all -fbacktrace -Wall > > CPPFLAGS = -g -fcheck=all -fbacktrace -Wall > > > > Does this make sense? > > > > Danyang > >