From 1d99310b2e552472e64375da3d131df63c63e9c7 Mon Sep 17 00:00:00 2001
From: Jan Eitzinger <jan@moebiusband.org>
Date: Sun, 18 Jun 2023 07:53:01 +0200
Subject: [PATCH] Fix bug in domain decomposition with MPI Cart

---
 BasicSolver/2D-mpi-v3/src/solver.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BasicSolver/2D-mpi-v3/src/solver.c b/BasicSolver/2D-mpi-v3/src/solver.c
index 3378e94..cf9baf5 100644
--- a/BasicSolver/2D-mpi-v3/src/solver.c
+++ b/BasicSolver/2D-mpi-v3/src/solver.c
@@ -333,8 +333,8 @@ void initSolver(Solver* solver, Parameter* params)
         &solver->jNeighbours[1]);
     MPI_Cart_get(solver->comm, NDIMS, solver->dims, periods, solver->coords);
 
-    solver->imaxLocal = sizeOfRank(solver->rank, dims[IDIM], solver->imax);
-    solver->jmaxLocal = sizeOfRank(solver->rank, dims[JDIM], solver->jmax);
+    solver->imaxLocal = sizeOfRank(solver->coords[IDIM], dims[IDIM], solver->imax);
+    solver->jmaxLocal = sizeOfRank(solver->coords[JDIM], dims[JDIM], solver->jmax);
 
     MPI_Datatype jBufferType;
     MPI_Type_contiguous(solver->imaxLocal, MPI_DOUBLE, &jBufferType);