diff --git a/SMILEBASIC/builtinfunctions.d b/SMILEBASIC/builtinfunctions.d
index 443fe6a..7716820 100644
--- a/SMILEBASIC/builtinfunctions.d
+++ b/SMILEBASIC/builtinfunctions.d
@@ -1205,13 +1205,13 @@ class BuiltinFunction
         munch(str, " ");
         if(str.length > 2 && str[0..2] == "&H")
         {
-            int r;
+            uint r;
             str = str[2..$];
-            if (tryParse!(int, wstring)(str, 16, r))
+            if (tryParse!(uint, wstring)(str, 16, r))
             {
                 if (!str.empty)
                     return 0;
-                return r;
+                return cast(int)r;
             }
             else
             {
@@ -1220,13 +1220,13 @@ class BuiltinFunction
         }
         if(str.length > 2 && str[0..2] == "&B")
         {
-            int r;
+            uint r;
             str = str[2..$];
-            if (tryParse!(int, wstring)(str, 2, r))
+            if (tryParse!(uint, wstring)(str, 2, r))
             {
                 if (!str.empty)
                     return 0;
-                return r;
+                return cast(int)r;
             }
             else
             {
diff --git a/SMILEBASIC/project.d b/SMILEBASIC/project.d
index 34a483b..e14d497 100644
--- a/SMILEBASIC/project.d
+++ b/SMILEBASIC/project.d
@@ -202,6 +202,13 @@ r"ファイルを書き込みます。
         File f = File(path, "rb");
         DataHeader[1] harray;
         f.rawRead(harray);
+        if (harray[0].magic != "PCBN0001")
+        {
+            f.seek(0);
+            harray[0].dimension = 1;
+            harray[0].dim[] = [cast(int)f.size, 0, 0, 0];
+            harray[0].type = DataType.int_;
+        }
         if (harray[0].dimension != contents.dimCount)
         {
             throw new TypeMismatch("LOAD");
@@ -241,6 +248,10 @@ r"ファイルを書き込みます。
             f.rawRead(array);
             result = array.map!(x => x.to!T).array;
         }
+        else
+        {
+            throw new TypeMismatch("LOAD(invalid file)");
+        }
         //配列に書き込むというより配列を差し替えている
         contents.array = result;
         contents.dim[] = harray[0].dim[];