diff --git a/src/Compiler/Compiler.cpp b/src/Compiler/Compiler.cpp
index f5ff05ccd..9b812fe5a 100644
--- a/src/Compiler/Compiler.cpp
+++ b/src/Compiler/Compiler.cpp
@@ -418,7 +418,7 @@ bool Compiler::RegisterCommands(TclInterpreter* interp, bool batchMode) {
                             const char* argv[]) -> int {
     Compiler* compiler = (Compiler*)clientData;
     std::string name = compiler->ProjManager()->projectName();
-    Tcl_AppendResult(interp, strdup(name.c_str()), nullptr);
+    Tcl_SetResult(interp, (char*)name.c_str(), TCL_VOLATILE);
     return TCL_OK;
   };
   interp->registerCmd("get_design_name", get_design_name, this, nullptr);
@@ -427,11 +427,65 @@ bool Compiler::RegisterCommands(TclInterpreter* interp, bool batchMode) {
                            const char* argv[]) -> int {
     Compiler* compiler = (Compiler*)clientData;
     std::string name = compiler->ProjManager()->DesignTopModule();
-    Tcl_AppendResult(interp, strdup(name.c_str()), nullptr);
+    Tcl_SetResult(interp, (char*)name.c_str(), TCL_VOLATILE);
     return TCL_OK;
   };
   interp->registerCmd("get_top_module", get_top_module, this, nullptr);
 
+  auto get_bin_path = [](void* clientData, Tcl_Interp* interp, int argc,
+                         const char* argv[]) -> int {
+    Compiler* compiler = (Compiler*)clientData;
+    std::string name = compiler->GetBinPath().string();
+    Tcl_SetResult(interp, (char*)name.c_str(), TCL_VOLATILE);
+    return TCL_OK;
+  };
+  interp->registerCmd("get_bin_path", get_bin_path, this, nullptr);
+
+  auto get_data_path = [](void* clientData, Tcl_Interp* interp, int argc,
+                          const char* argv[]) -> int {
+    Compiler* compiler = (Compiler*)clientData;
+    std::string name = compiler->GetDataPath().string();
+    Tcl_SetResult(interp, (char*)name.c_str(), TCL_VOLATILE);
+    return TCL_OK;
+  };
+  interp->registerCmd("get_data_path", get_data_path, this, nullptr);
+
+  auto get_python3_path = [](void* clientData, Tcl_Interp* interp, int argc,
+                             const char* argv[]) -> int {
+    Compiler* compiler = (Compiler*)clientData;
+    std::filesystem::path python3Path = compiler->GetDataPath() / ".." /
+                                        "envs" / "python3.8" / "bin" /
+                                        "python3";
+    std::string name = python3Path.string();
+    Tcl_SetResult(interp, (char*)name.c_str(), TCL_VOLATILE);
+    return TCL_OK;
+  };
+  interp->registerCmd("get_python3_path", get_python3_path, this, nullptr);
+
+  auto message = [](void* clientData, Tcl_Interp* interp, int argc,
+                    const char* argv[]) -> int {
+    Compiler* compiler = (Compiler*)clientData;
+    std::string text;
+    for (int i = 1; i < argc; i++) {
+      text += std::string(argv[i]) + " ";
+    }
+    compiler->Message(text);
+    return TCL_OK;
+  };
+  interp->registerCmd("message", message, this, nullptr);
+
+  auto error_message = [](void* clientData, Tcl_Interp* interp, int argc,
+                          const char* argv[]) -> int {
+    Compiler* compiler = (Compiler*)clientData;
+    std::string text;
+    for (int i = 1; i < argc; i++) {
+      text += std::string(argv[i]) + " ";
+    }
+    compiler->ErrorMessage(text);
+    return TCL_ERROR;
+  };
+  interp->registerCmd("error_message", error_message, this, nullptr);
+
   auto get_top_simulation_module = [](void* clientData, Tcl_Interp* interp,
                                       int argc, const char* argv[]) -> int {
     Compiler* compiler = (Compiler*)clientData;
diff --git a/src/Simulation/Simulator.cpp b/src/Simulation/Simulator.cpp
index 92e6c51ed..70bc6f9e4 100644
--- a/src/Simulation/Simulator.cpp
+++ b/src/Simulation/Simulator.cpp
@@ -253,55 +253,9 @@ bool Simulator::RegisterCommands(TclInterpreter* interp) {
   };
   interp->registerCmd("simulation_options", simulation_options, this, 0);
 
-  auto auto_testbench = [](void* clientData, Tcl_Interp* interp, int argc,
-                           const char* argv[]) -> int {
-    Simulator* simulator = (Simulator*)clientData;
-    float clock_period = 5.0;
-    for (int i = 1; i < argc; i++) {
-      std::string arg = argv[i];
-      if (arg == "-clock_period") {
-        i++;
-        arg = argv[i];
-        clock_period = std::atof(arg.c_str());
-      }
-    }
-    int result = simulator->GenerateAutoTestbench(clock_period);
-    if (result != 0) {
-      return TCL_ERROR;
-    }
-    return TCL_OK;
-  };
-  interp->registerCmd("auto_testbench", auto_testbench, this, 0);
-
   return ok;
 }
 
-int Simulator::GenerateAutoTestbench(float clock_period) {
-  Message("##################################################");
-  Message("Generating automatic RTL vs gate-level testbench ");
-  Message("##################################################");
-  std::filesystem::path python3Path = m_compiler->GetDataPath() / ".." /
-                                      "envs" / "python3.8" / "bin" / "python3";
-  std::filesystem::path scriptPath =
-      m_compiler->GetDataPath() / "python3" / "tb_generator.py";
-  const auto& path = std::filesystem::current_path();
-  std::string workingDir =
-      std::filesystem::path(path / ProjManager()->projectName()).string();
-  std::string command = std::string(python3Path.string()) + " " +
-                        std::string(scriptPath.string()) + " " +
-                        ProjManager()->projectName() + " " +
-                        std::string(path.string()) + " " + std::to_string(100) +
-                        " " + std::to_string(clock_period);
-  FileUtils::WriteToFile(CommandLogFile("comp"), command);
-  int status = m_compiler->ExecuteAndMonitorSystemCommand(
-      command, "auto-testbench.log", false, workingDir);
-  if (status == 0)
-    Message("Testbench is generated.");
-  else
-    ErrorMessage("Testbench generation failed");
-  return status;
-}
-
 bool Simulator::Clean(SimulationType action) {
   Message("Cleaning simulation results for " + ProjManager()->projectName());
   auto base = m_compiler->FilePath(Compiler::ToCompilerAction(action));
diff --git a/src/Simulation/Simulator.h b/src/Simulation/Simulator.h
index 717645052..dac15d1db 100644
--- a/src/Simulation/Simulator.h
+++ b/src/Simulation/Simulator.h
@@ -115,8 +115,6 @@ class Simulator {
   void UserSimulationType(SimulationType simulation, SimulatorType simulator);
   SimulatorType UserSimulationType(SimulationType simulation, bool& ok) const;
 
-  int GenerateAutoTestbench(float clock_period);
-
   bool IsTimedSimulation() { return m_timed_simulation; }
   void SetTimedSimulation(bool timed) { m_timed_simulation = timed; }