diff --git a/lib/shell.js b/lib/shell.js
index 2a37013..a82a0b9 100644
--- a/lib/shell.js
+++ b/lib/shell.js
@@ -73,23 +73,32 @@ var ShellObject = function() {
         }
     };
 
-    this.exec = function(cmd, stdOutPath) {
-        var data;
+    this.exec = function(cmd, stdOutPath, stdErrPath) {
+        var stdout, stderr;
+		var stdOutPath = (typeof(stdOutPath) === "undefined" ? "stdout.txt" : stdOutPath);
+		var stdErrPath = (typeof(stdErrPath) === "undefined" ? "stderr.txt" : stdErrPath);
 
-        if (typeof(stdOutPath) === "undefined") {
-            stdOutPath = "stdout.txt";
-        }
         var c = "%comspec% /c (" + this.build(cmd) + ") 1> " + stdOutPath;
-        c += " 2>&1";
+        //c += " 2>&1";
+		c += " 2> " + stdErrPath;
         this.interface.Run(c, 0, true);
         console.info("ShellObject.exec() -> " + c);
-        data = FILE.readFile(stdOutPath, "utf-8");
-    
-        if (FILE.fileExists(stdOutPath)) {
-            FILE.deleteFile(stdOutPath);
-        }
+		sleep(1);
 
-        return data;
+		if (FILE.fileExists(stdOutPath)) {
+			stdout = FILE.readFile(stdOutPath, "utf-8");
+			FILE.deleteFile(stdOutPath);
+		}
+
+		if (FILE.fileExists(stdErrPath)) {
+			stderr = FILE.readFile(stdErrPath, "utf-8");
+			FILE.deleteFile(stdErrPath);
+		}
+
+		//console.log("[stdout] " + stdout);
+		//console.log("[stderr] " + stderr);
+
+        return stdout;
     };
 
     this.run = function(cmd, fork) {