diff --git a/SMILEBASIC/SMILEBASIC.visualdproj b/SMILEBASIC/SMILEBASIC.visualdproj
index a36e6c6..e59c89c 100644
--- a/SMILEBASIC/SMILEBASIC.visualdproj
+++ b/SMILEBASIC/SMILEBASIC.visualdproj
@@ -206,6 +206,7 @@
  </Config>
  <Folder name="SMILEBASIC">
   <File path="compiler.d" />
+  <File path="error.d" />
   <File path="main.d" />
   <File path="node.d" />
   <File path="parser.d" />
diff --git a/SMILEBASIC/VM.d b/SMILEBASIC/VM.d
index 901bc4f..a1ea627 100644
--- a/SMILEBASIC/VM.d
+++ b/SMILEBASIC/VM.d
@@ -1,6 +1,7 @@
 module otya.smilebasic.vm;
 import otya.smilebasic.type;
 import otya.smilebasic.token;
+import otya.smilebasic.error;
 import std.uni;
 import std.utf;
 import std.conv;
@@ -12,13 +13,32 @@ class VM
     int pc;
     Value[] stack;
     Value[] global;
-    int[wstring] debugTable;
-    this(Code[] code, int len, int[wstring] debugTable)
+    int[wstring] globalTable;
+    ValueType getType(wstring name)
+    {
+        wchar s = name[name.length - 1];
+        switch(s)
+        {
+            case '$':
+                return ValueType.String;
+            case '#':
+                return ValueType.Double;
+            case '%':
+                return ValueType.Integer;
+            default:
+                return ValueType.Integer;//DEFINT時
+        }
+    }
+    this(Code[] code, int len, int[wstring] globalTable)
     {
         this.code = code;
         this.stack = new Value[1024 * 1024];
         this.global = new Value[len];
-        this.debugTable = debugTable;
+        this.globalTable = globalTable;
+        foreach(wstring k, int v ; globalTable)
+        {
+            this.global[v] = Value(getType(k));
+        }
     }
     void run()
     {
@@ -44,9 +64,9 @@ class VM
         }
         value = stack[--stacki];
     }
-    Value testGetGlobaVariable(wstring name)
+    Value testGetGlobalVariable(wstring name)
     {
-        return global[debugTable[name]];
+        return global[globalTable[name]];
     }
 }
 enum CodeType
@@ -137,7 +157,29 @@ class PopG : Code
     }
     override void execute(VM vm)
     {
-        vm.pop(vm.global[var]);
+        Value v;
+        Value g = vm.global[var];
+        vm.pop(v);
+        if(v.type == ValueType.Integer && g.type == ValueType.Double)
+        {
+            vm.global[var] = Value(cast(double)v.integerValue);
+            return;
+        }
+        if(g.type == ValueType.Integer && v.type == ValueType.Double)
+        {
+            vm.global[var] = Value(cast(int)v.doubleValue);
+            return;
+        }
+        if(v.type == ValueType.Void)
+        {
+            vm.global[var] = v;
+            return;
+        }
+        if(v.type != g.type)
+        {
+            throw new TypeMismatch();
+        }
+        vm.global[var] = v;
     }
 }
 class Operate : Code
@@ -185,8 +227,7 @@ class Operate : Code
                         return;
                     default:
                         //type mismatch
-                        stderr.writeln("Type mismatch");
-                        return;
+                        throw new TypeMismatch();
                 }
             }
             if(r.type == ValueType.Integer || r.type == ValueType.Double)
@@ -214,8 +255,7 @@ class Operate : Code
                         return;
                     default:
                         //type mismatch
-                        stderr.writeln("Type mismatch");
-                        return;
+                        throw new TypeMismatch();
                 }
             }
         }
diff --git a/SMILEBASIC/compiler.d b/SMILEBASIC/compiler.d
index c6e3187..9aceb51 100644
--- a/SMILEBASIC/compiler.d
+++ b/SMILEBASIC/compiler.d
@@ -70,7 +70,7 @@ class Compiler
         int global = this.global.get(name, 0);
         if(global == 0)
         {
-            this.global[name] = ++globalIndex = global;
+            this.global[name] = global = ++globalIndex;
         }
         else
         {
@@ -85,7 +85,7 @@ class Compiler
         {
             //local変数をあたる
             //それでもだめならOPTION STRICTならエラー
-            this.global[name] = ++globalIndex = global;
+            this.global[name] = global = ++globalIndex;
         }
         return global;
     }
@@ -276,6 +276,6 @@ unittest
     auto parser = new Parser("A=1+2+3+4*5/4-5+(6+6)*7");
     auto vm = parser.compile();
     vm.run();
-    writeln(vm.testGetGlobaVariable("A").integerValue);
-    assert(vm.testGetGlobaVariable("A").integerValue == 1+2+3+4*5/4-5+(6+6)*7);
+    writeln(vm.testGetGlobalVariable("A").integerValue);
+    assert(vm.testGetGlobalVariable("A").integerValue == 1+2+3+4*5/4-5+(6+6)*7);
 }
diff --git a/SMILEBASIC/main.d b/SMILEBASIC/main.d
index 2da5d92..e360c89 100644
--- a/SMILEBASIC/main.d
+++ b/SMILEBASIC/main.d
@@ -3,6 +3,7 @@ import std.utf;
 import std.conv;
 import std.file;
 import otya.smilebasic.parser;
+import otya.smilebasic.error;
 int main(string[] argv)
 {
     version(none)
@@ -11,8 +12,7 @@ int main(string[] argv)
         writeln(parser.calc());
     }
 
-    version(none)
-    {
+    
     auto parser = new Parser(
 //"@A\nA=1+2+3+4\nPRINT 1+1,2+3;10-5,A:A=A*2 PRINT A
 "IF 1 THEN PRINT 2
@@ -44,11 +44,21 @@ FOR I=0 TO 100
   ENDIF
  ENDIF
 NEXT
+A$=\"A\"
+?A$
+A$=2
+?A$
 ");
-    }
-    auto parser = new Parser(readText("FIZZBUZZ.TXT").to!wstring);
+    version(none) auto parser = new Parser(readText("FIZZBUZZ.TXT").to!wstring);
     auto vm = parser.compile();
-    vm.run();
+    try
+    {
+        vm.run();
+    }
+    catch(SmileBasicError sbe)
+    {
+        writeln(sbe);
+    }
     readln();
     return 0;
 }
diff --git a/SMILEBASIC/parser.d b/SMILEBASIC/parser.d
index 0f3da9d..277c8f9 100644
--- a/SMILEBASIC/parser.d
+++ b/SMILEBASIC/parser.d
@@ -774,5 +774,5 @@ unittest
     //Eval("test(2+5)") = 2+5;
     //Eval("test(2+5, test(2, 3+5))") = 3+5;
     Test!"2-3*4-5"();
-    Test!"1+2+3+4*5/4-5+(6+6)*7"();
+    Test!"1+2+3+4*5/4-5+(6+6)*7";
 }
diff --git a/SMILEBASIC/type.d b/SMILEBASIC/type.d
index fa86277..f86567a 100644
--- a/SMILEBASIC/type.d
+++ b/SMILEBASIC/type.d
@@ -1,6 +1,7 @@
 module otya.smilebasic.type;
 enum ValueType : byte
 {
+    Void,//DEF A()ENDの返り値とか未初期化の変数とか
     Integer,
     Double,
     String,
@@ -34,6 +35,14 @@ struct Value
         this.type = ValueType.String;
         stringValue = value;
     }
+    this(ValueType type)
+    {
+        this.type = type;
+        if(type == ValueType.String)
+        {
+            stringValue = "";
+        }
+    }
     void castOp(ValueType type)
     {
         switch(type)