diff --git a/bsp/simulator/SConstruct b/bsp/simulator/SConstruct
index 4db7328f2..79522c5a7 100755
--- a/bsp/simulator/SConstruct
+++ b/bsp/simulator/SConstruct
@@ -13,7 +13,6 @@ else:
     # set the rtgui root directory by hand
     # empty string means use the RTGUI in svn
     RTT_RTGUI = os.path.normpath(r'F:\Project\git\rt-gui\components\rtgui')
-    # RTT_RTGUI =''
 
 sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 from building import *
@@ -88,18 +87,27 @@ else:
 
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False, remove_components=['rtgui'])
 if GetDepend('RT_USING_RTGUI'):
-    if RTT_RTGUI:
-        objs += SConscript(os.path.join(RTT_RTGUI, 'SConscript'),
-						   variant_dir='build/components/rtgui',
-						   duplicate=0)
-        objs = objs + SConscript(RTT_RTGUI+'/../../demo/examples/SConscript', 
-				variant_dir='build/examples/gui', duplicate=0)
-    else:
-        objs += SConscript(os.path.join(RTT_ROOT + '/components/rtgui', 'SConscript'),
-						   variant_dir='build/components/rtgui',
-						   duplicate=0)
-        objs = objs + SConscript(RTT_ROOT + '/examples/gui/SConscript', 
-				variant_dir='build/examples/gui', duplicate=0)
+    try:
+        if RTT_RTGUI:
+            objs += SConscript(os.path.join(RTT_RTGUI, 'SConscript'),
+                                   variant_dir='build/components/rtgui',
+                                   duplicate=0)
+            objs = objs + SConscript(RTT_RTGUI+'/../../demo/examples/SConscript',
+                        variant_dir='build/examples/gui', duplicate=0)
+        else:
+            objs += SConscript(os.path.join(RTT_ROOT + '/components/rtgui', 'SConscript'),
+                                   variant_dir='build/components/rtgui',
+                                   duplicate=0)
+            objs = objs + SConscript(RTT_ROOT + '/examples/gui/SConscript',
+                    variant_dir='build/examples/gui', duplicate=0)
+    except:
+        print
+        print 'RTGUI configuration is invalid!'
+        print 'RT_USING_RTGUI is enabled in rtconfig.h, but scons cannot find '+\
+              'RTGUI source code. In order to eliminate this error, you can '+\
+              'add RTT_RTGUI in environment to point RTGUI source code, or '+\
+              'disable RT_USING_RTGUI in rtconfig.h'
+        exit(-1);
 
 if GetDepend('RT_USING_TC'):
     objs = objs + SConscript(RTT_ROOT + '/examples/kernel/SConscript', variant_dir = 'build/tc/kernel', duplicate=0)
diff --git a/bsp/simulator/drivers/SConscript b/bsp/simulator/drivers/SConscript
index 739d8f2b5..f71b3f9ea 100644
--- a/bsp/simulator/drivers/SConscript
+++ b/bsp/simulator/drivers/SConscript
@@ -22,9 +22,9 @@ if GetDepend('RT_USING_DFS') == False or GetDepend('RT_USING_MTD_NAND') == False
     SrcRemove(src, 'nanddrv_file.c')
 if GetDepend('RT_USING_DFS') == False or GetDepend('RT_USING_MTD_NOR') == False:
     SrcRemove(src, 'sst25vfxx_mtd_sim.c')
-if GetDepend('RT_USING_DFS_WINSHAREDIR') == False:
+if GetDepend('RT_USING_DFS') == False or GetDepend('RT_USING_DFS_WINSHAREDIR') == False:
     SrcRemove(src, 'dfs_win32.c')
-if GetDepend('RT_USING_MODULE') == False:
+if GetDepend('RT_USING_DFS') == False or GetDepend('RT_USING_MODULE') == False:
     SrcRemove(src, ['module_win32.c'])
 if GetDepend('RT_USING_TAPNETIF') == False:
     SrcRemove(src, ['tap_netif.c'])