diff --git a/EcomAnalysis/Form1.cs b/EcomAnalysis/Form1.cs
index af0281d..c2a8088 100644
--- a/EcomAnalysis/Form1.cs
+++ b/EcomAnalysis/Form1.cs
@@ -76,7 +76,7 @@
 
             // ログファイル情報の処理
             if (!_LogFileInfo.Set(filename)) {
-                MessageBox.Show("Logファイル名が正しくありません", "Error",
+                MessageBox.Show("Logファイルが正しくありません", "Error",
                     MessageBoxButtons.OK, MessageBoxIcon.Error);
                 return false;
             }
diff --git a/EcomAnalysis/LogFileInfo.cs b/EcomAnalysis/LogFileInfo.cs
index c2dc9ff..4d6bf5b 100644
--- a/EcomAnalysis/LogFileInfo.cs
+++ b/EcomAnalysis/LogFileInfo.cs
@@ -32,14 +32,17 @@
 
             var parseStr = "yyyyMMdd_HHmmss";
             DateTime dt;
+            if (Filename.Length < parseStr.Length) return false;
             if (!DateTime.TryParseExact(Filename.Substring(0, parseStr.Length),
                 parseStr, CultureInfo.InvariantCulture, DateTimeStyles.None, out dt)) return false;
             ExecDate = dt;
 
             var strs = Filename.Split('_');
             if (strs.Length < 4) return false;
-
+ 
             var visitStr = strs[strs.Length - 1];
+            if (visitStr.Equals("calib")) return false;
+
             int v;
             if (!int.TryParse(visitStr, out v)) return false;
             Visit = v;