diff --git a/src/main/java/jaist/css/covis/mi/MethodInvocationDialog.java b/src/main/java/jaist/css/covis/mi/MethodInvocationDialog.java
index 8a1aa8b..ea1fcab 100644
--- a/src/main/java/jaist/css/covis/mi/MethodInvocationDialog.java
+++ b/src/main/java/jaist/css/covis/mi/MethodInvocationDialog.java
@@ -78,6 +78,10 @@
 				Object[] args = new Object[wm.paramClses.length];
 				for(int i=0;i<wm.paramClses.length;i++){
 					args[i] = jcb[i].getSelectedItemObject();
+					if (args[i]==null){
+						args[i] = Integer.parseInt(jcb[i].getSelectedItemString());
+					}
+					// System.out.println(i+" "+args[i]);
 				}
 				//メソッドコールを文字列に
 				StringBuffer sb = new StringBuffer();
@@ -104,6 +108,7 @@
 	public void invokeMethod(Object[] args, String methodcall) {
 		Object retValObject = null;
 		try {
+			// if (args != null) for(int i=0;i<args.length;i++) System.out.println(args[i]);
 			retValObject = wm.method.invoke(wm.variable.anchor.destObject, args);
 		} catch (IllegalArgumentException e1) {
 			e1.printStackTrace();