diff --git a/src/gpu/VirtualFluids_GPU/DataStructureInitializer/GridReaderGenerator/GridGenerator.cpp b/src/gpu/VirtualFluids_GPU/DataStructureInitializer/GridReaderGenerator/GridGenerator.cpp
index 9dc20cceb489e35bc3b986885372cb52d19fb04a..0debc795de1f51e6289d05e73d241bca86a89602 100644
--- a/src/gpu/VirtualFluids_GPU/DataStructureInitializer/GridReaderGenerator/GridGenerator.cpp
+++ b/src/gpu/VirtualFluids_GPU/DataStructureInitializer/GridReaderGenerator/GridGenerator.cpp
@@ -921,7 +921,7 @@ void GridGenerator::allocArrays_OffsetScale()
         builder->getOffsetFC(para->getParH(level)->offFC.xOffFC, para->getParH(level)->offFC.yOffFC, para->getParH(level)->offFC.zOffFC, level);
         builder->getGridInterfaceIndices(para->getParH(level)->intCF.ICellCFC, para->getParH(level)->intCF.ICellCFF, para->getParH(level)->intFC.ICellFCC, para->getParH(level)->intFC.ICellFCF, level);
         
-        if (para->getUseStreams()) {
+        if (para->getUseStreams() || para->getNumprocs() > 1) {
             // split fine-to-coarse indices into border and bulk
             para->getParH(level)->intFCBorder.ICellFCC = para->getParH(level)->intFC.ICellFCC; 
             para->getParH(level)->intFCBorder.ICellFCF = para->getParH(level)->intFC.ICellFCF; 
diff --git a/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp b/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
index d50129fbb17324decfb8fc5b2136e1d8cb434774..4a7556499c5ce953e72c576f8e89cfff0b432916 100644
--- a/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
+++ b/src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp
@@ -139,10 +139,9 @@ void Simulation::init(SPtr<Parameter> para, SPtr<GridProvider> gridProvider, std
    cudaManager->setMemsizeGPU(0, true);
    //////////////////////////////////////////////////////////////////////////
    gridProvider->allocArrays_CoordNeighborGeo();
+   gridProvider->allocArrays_OffsetScale();
    gridProvider->allocArrays_BoundaryValues();
    gridProvider->allocArrays_BoundaryQs();
-   gridProvider->allocArrays_OffsetScale();
-
 
    //////////////////////////////////////////////////////////////////////////
    //Kernel init