diff --git a/chip/pm4_me.pas b/chip/pm4_me.pas
index 7f044ff7..18ef94cc 100644
--- a/chip/pm4_me.pas
+++ b/chip/pm4_me.pas
@@ -6,6 +6,7 @@ unit pm4_me;
 interface
 
 uses
+ sysutils,
  mqueue,
  LFQueue,
 
@@ -182,6 +183,13 @@ begin
  GPU_REGS.CX_REG:=CX_REG;
  GPU_REGS.UC_REG:=UC_REG;
 
+ for i:=0 to 31 do
+ begin
+  Assert(CX_REG^.SPI_PS_INPUT_CNTL[i].OFFSET     =0,'SPI_PS_INPUT_CNTL['+IntToStr(i)+']='+IntToStr(CX_REG^.SPI_PS_INPUT_CNTL[i].OFFSET     ));
+  Assert(CX_REG^.SPI_PS_INPUT_CNTL[i].DEFAULT_VAL=0,'SPI_PS_INPUT_CNTL['+IntToStr(i)+']='+IntToStr(CX_REG^.SPI_PS_INPUT_CNTL[i].DEFAULT_VAL));
+  Assert(CX_REG^.SPI_PS_INPUT_CNTL[i].FLAT_SHADE =0,'SPI_PS_INPUT_CNTL['+IntToStr(i)+']='+IntToStr(CX_REG^.SPI_PS_INPUT_CNTL[i].FLAT_SHADE ));
+ end;
+
  {fdump_ps:=}DumpPS(GPU_REGS);
  {fdump_vs:=}DumpVS(GPU_REGS);
 
diff --git a/gui/main.pas b/gui/main.pas
index e22a4e20..5fbfcd73 100644
--- a/gui/main.pas
+++ b/gui/main.pas
@@ -432,36 +432,45 @@ begin
  FGameList.FGrid:=ListGrid;
 
  //load config
- m:=nil;
- JReader:=nil;
- try
-  m:=TMemoryStream.Create;
-  m.LoadFromFile(fpps4File);
-  JReader:=TJSONStreamReader.Create(m,[joUTF8,joComments]);
-  JReader.Execute(FConfigInfo);
- except
-  on E: Exception do
-    MessageDlgEx(E.Message,mtError,[mbOK],Self);
+ if FileExists(fpps4File) then
+ begin
+  m:=nil;
+  JReader:=nil;
+  try
+   m:=TMemoryStream.Create;
+   m.LoadFromFile(fpps4File);
+   JReader:=TJSONStreamReader.Create(m,[joUTF8,joComments]);
+   JReader.Execute(FConfigInfo);
+  except
+   on E: Exception do
+     MessageDlgEx(E.Message,mtError,[mbOK],Self);
+  end;
+  FreeAndNil(JReader);
+  FreeAndNil(m);
  end;
- FreeAndNil(JReader);
-
- obj:=TGameListObject.Create;
- obj.GameList:=FGameList;
 
  //load game list
- m.Clear;
- try
-  m:=TMemoryStream.Create;
-  m.LoadFromFile(GameListFile);
-  JReader:=TJSONStreamReader.Create(m,[joUTF8,joComments]);
-  JReader.Execute(obj);
- except
-  on E: Exception do
-    MessageDlgEx(E.Message,mtError,[mbOK],Self);
- end;
- FreeAndNil(JReader);
+ if FileExists(GameListFile) then
+ begin
+  obj:=TGameListObject.Create;
+  obj.GameList:=FGameList;
 
- FreeAndNil(obj);
+  m:=nil;
+  JReader:=nil;
+  try
+   m:=TMemoryStream.Create;
+   m.LoadFromFile(GameListFile);
+   JReader:=TJSONStreamReader.Create(m,[joUTF8,joComments]);
+   JReader.Execute(obj);
+  except
+   on E: Exception do
+     MessageDlgEx(E.Message,mtError,[mbOK],Self);
+  end;
+  FreeAndNil(JReader);
+  FreeAndNil(m);
+
+  FreeAndNil(obj);
+ end;
 
  //update grid
  C:=FGameList.GetArrayCount;
@@ -494,7 +503,13 @@ begin
  FreeAndNil(jstream);
  FreeAndNil(list);
 
- M.SaveToFile(GameListFile);
+ try
+  M.SaveToFile(GameListFile);
+ except
+  on E: Exception do
+    MessageDlgEx(E.Message,mtError,[mbOK],Self);
+ end;
+
  FreeAndNil(M);
 end;
 
@@ -858,7 +873,13 @@ begin
  FConfigInfo.WriteJSON('',jstream);
  FreeAndNil(jstream);
 
- M.SaveToFile(fpps4File);
+ try
+  M.SaveToFile(fpps4File);
+ except
+  on E: Exception do
+    MessageDlgEx(E.Message,mtError,[mbOK],Self);
+ end;
+
  FreeAndNil(M);
 end;