Arguments that expect an array of integers and you want to pass nothing you should use PETSC_NULL_INTEGER_ARRAY
> On Oct 2, 2024, at 4:08 PM, Sanjay Govindjee via petsc-users > <petsc-users@mcs.anl.gov> wrote: > > In the release notes, it mentions the introduction of > PETSC_NULL_INTEGER_ARRAY. Am I correct in interpreting this to mean that I > can/should change my usage of > PETSC_NULL_INTEGER(1) in function calls to PETSc routines to > PETSC_NULL_INTEGER_ARRAY? > > -sanjay