diff --git a/yab2cpp.h b/yab2cpp.h
index 9c7b93e..d26493e 100644
--- a/yab2cpp.h
+++ b/yab2cpp.h
@@ -53,7 +53,8 @@ enum COMPILE_ERRORS {
 	E_GOSUB_CANNOT_RETURN_VALUE,
 	E_SUBROUTINE_NOT_FOUND,
 	E_TOO_MANY_PARAMETERS,
-	E_UNASSIGNABLE_TYPE
+	E_UNASSIGNABLE_TYPE,
+	E_UNDIMENSIONED_ARRAY
 };
 
 extern enum COMPILE_ERRORS errorLevel;
@@ -363,6 +364,7 @@ public:
 	static shared_ptr<variable>getOrCreateVar(string &name, enum TYPES t);
 
 	void assignment(shared_ptr<expression>value);
+	/* always call generateBox() after new variable() */
 	variable(enum SCOPES s, string &name, enum TYPES t);
 	variable();
 	~variable()
@@ -373,8 +375,9 @@ class arrayType:public variable
 {
 	list<unsigned int> dimensions;
 public:
+	string generateBox(enum SCOPES s);
 	virtual string boxName(list<unsigned int>indexes);
-	virtual string boxName(){error(E_TYPE_MISMATCH);}
+	virtual string boxName(){error(E_UNDIMENSIONED_ARRAY);}
 
 	explicit arrayType(string &name, enum TYPES t, list<unsigned int>dim);
 		/*:variable(scope, name, t);*/
diff --git a/yabDataStructures.cpp b/yabDataStructures.cpp
index 97dffc9..bbd2cc2 100644
--- a/yabDataStructures.cpp
+++ b/yabDataStructures.cpp
@@ -352,7 +352,6 @@ variable::variable(enum SCOPES s, string &name, enum TYPES t):operands(t)
 		default:
 			error(E_INTERNAL);
 	}
-	this->generateBox(s);
 }
 
 shared_ptr<variable> variable::getOrCreateVar(string &name, enum TYPES t)
@@ -365,8 +364,10 @@ shared_ptr<variable> variable::getOrCreateVar(string &name, enum TYPES t)
 		if(i!=statics.end())return i->second;
 	}
 	if (globals.find(name)!=globals.end())return globals[name];
-	return shared_ptr<variable>(new variable(scopeGlobal?S_GLOBAL:S_LOCAL, 
-		name, t));
+	shared_ptr<variable>v=shared_ptr<variable>(new variable(
+		scopeGlobal?S_GLOBAL:S_LOCAL, name, t));
+	v->generateBox(scopeGlobal?S_GLOBAL:S_LOCAL);
+	return v;
 }
 
 void variable::assignment(shared_ptr<expression>value)
@@ -396,3 +397,48 @@ void variable::assignment(shared_ptr<expression>value)
 			break;
 	}
 }
+
+string arrayType::boxName(list<unsigned int>indexes)
+{
+	ostringstream out;
+	string buf;
+	auto i=indexes.begin();
+	out << 'v' << this->getID();
+	while (i!=indexes.end())
+	{
+		out << '[' << *i << ']';
+	}
+	out.str(buf);
+	out.clear();
+	return buf;
+}
+
+string arrayType::generateBox(enum SCOPES s)
+{
+	ostringstream out;
+	string buf;
+	switch (this->getType())
+	{
+		case T_STRINGCALL_ARRAY:
+			out << "string ";
+			break;
+		case T_INTCALL_ARRAY:
+			out << "int ";
+			break;
+		case T_FLOATCALL_ARRAY:
+			out << "double ";
+			break;
+		default:
+			error(E_INTERNAL);
+	}
+	out << boxName(this->dimensions) << ";\n";
+	out.str(buf);
+	out.clear();
+	return buf;
+}
+
+arrayType::arrayType(string &name, enum TYPES t, list<unsigned int>dim):
+	variable(S_GLOBAL, name, t)
+{
+	this->dimensions=dim;
+}
\ No newline at end of file