Index: tools/lldb-mi/MICmdCmdExec.h
===================================================================
--- tools/lldb-mi/MICmdCmdExec.h
+++ tools/lldb-mi/MICmdCmdExec.h
@@ -121,7 +121,6 @@
 
   // Attributes:
 private:
-  lldb::SBCommandReturnObject m_lldbResult;
   const CMIUtilString m_constStrArgNumber; // Not specified in MI spec but
                                            // Eclipse gives this option
 };
Index: tools/lldb-mi/MICmdCmdExec.cpp
===================================================================
--- tools/lldb-mi/MICmdCmdExec.cpp
+++ tools/lldb-mi/MICmdCmdExec.cpp
@@ -358,6 +358,7 @@
   CMICmnLLDBDebugSessionInfo &rSessionInfo(
       CMICmnLLDBDebugSessionInfo::Instance());
 
+  lldb::SBError error;
   if (nThreadId != UINT64_MAX) {
     lldb::SBThread sbThread = rSessionInfo.GetProcess().GetThreadByIndexID(nThreadId);
     if (!sbThread.IsValid()) {
@@ -366,10 +367,14 @@
                                      m_constStrArgThread.c_str()));
       return MIstatus::failure;
     }
-    sbThread.StepOver();
-  } else rSessionInfo.GetProcess().GetSelectedThread().StepOver();
+    sbThread.StepOver(error);
+  } else rSessionInfo.GetProcess().GetSelectedThread().StepOver(error);
 
-  return MIstatus::success;
+  if (error.Success())
+    return MIstatus::success;
+
+  SetError(error.GetCString());
+  return MIstatus::failure;
 }
 
 //++
@@ -384,21 +389,8 @@
 // Throws:  None.
 //--
 bool CMICmdCmdExecNext::Acknowledge() {
-  if (m_lldbResult.GetErrorSize() > 0) {
-    const char *pLldbErr = m_lldbResult.GetError();
-    MIunused(pLldbErr);
-    const CMICmnMIValueConst miValueConst(m_lldbResult.GetError());
-    const CMICmnMIValueResult miValueResult("message", miValueConst);
-    const CMICmnMIResultRecord miRecordResult(
-        m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Error,
-        miValueResult);
-    m_miResultRecord = miRecordResult;
-  } else {
-    const CMICmnMIResultRecord miRecordResult(
-        m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Running);
-    m_miResultRecord = miRecordResult;
-  }
-
+  m_miResultRecord = CMICmnMIResultRecord(
+      m_cmdData.strMiCmdToken, CMICmnMIResultRecord::eResultClass_Running);
   return MIstatus::success;
 }