diff --git a/src/PIM/Compiler/PimCodeGen.cpp b/src/PIM/Compiler/PimCodeGen.cpp
index 25d0a6f..e60d3a7 100644
--- a/src/PIM/Compiler/PimCodeGen.cpp
+++ b/src/PIM/Compiler/PimCodeGen.cpp
@@ -494,6 +494,15 @@ OnnxMlirCompilerErrorCodes compileModuleToPIMJSON(ModuleOp& moduleOp, std::strin
   memoryFileStream.write(memoryBuffer.data(), memoryBuffer.size());
   memoryFileStream.close();
 
+  auto outputHostCorePath = outputDirPath + "/core_0.json";
+  llvm::raw_fd_ostream hostFileStream(outputHostCorePath, errorCode);
+  if (errorCode) {
+    llvm::errs() << "Error while opening host core file `" << outputHostCorePath << "`: " << errorCode.message() << '\n';
+    return InvalidOutputFileAccess;
+  }
+  hostFileStream << "[]";
+  hostFileStream.close();
+
   size_t coreCount = 0;
   for (auto coreOp : funcOp.getOps<pim::PimCoreOp>()) {
     auto coreId = coreOp.getCoreId();
diff --git a/src/PIM/Conversion/SpatialToPIM/SpatialToPIMPass.cpp b/src/PIM/Conversion/SpatialToPIM/SpatialToPIMPass.cpp
index 11d9a8a..c4ed4d0 100644
--- a/src/PIM/Conversion/SpatialToPIM/SpatialToPIMPass.cpp
+++ b/src/PIM/Conversion/SpatialToPIM/SpatialToPIMPass.cpp
@@ -25,7 +25,7 @@ namespace onnx_mlir {
 namespace pim {
 
 void SpatialToPIMPass::runOnOperation() {
-  coreId = 0;
+  coreId = 1;
   ModuleOp moduleOp = getOperation();
   MLIRContext* ctx = moduleOp.getContext();