Index: CommandLine.java
===================================================================
--- CommandLine.java	(revision 1654)
+++ CommandLine.java	(working copy)
@@ -120,6 +120,18 @@
         }
     }
 
+    /**
+     * @exception CmdLineException If an error is detected.
+     */
+    private static void assertExitSuccess(int exitCode, String errMsg)
+        throws CmdLineException {
+        if (exitCode != 0) {
+            throw new CmdLineException(errMsg.length() > 0 ? errMsg :
+                                       "Command failed with exit " +
+                                       "code " + exitCode);
+        }
+    }
+
 	/**
 	 * Runs the process and returns the results.
 	 * @param svnArguments The arguments to pass to the command-line
@@ -138,9 +150,8 @@
 
 		try {
             String errMessage = errPumper.toString();
-            if (errMessage.length() > 0) {
-                throw new CmdLineException(errMessage);        
-            }
+            assertExitSuccess(proc.exitValue(), errMessage);
+
             String outputString = outPumper.toString(); 
 
             notifyFromSvnOutput(outputString);
@@ -170,9 +181,7 @@
         
 		try {
             String errMessage = errPumper.toString();
-            if (errMessage.length() > 0) {
-                throw new CmdLineException(errMessage);        
-            }
+            assertExitSuccess(proc.exitValue(), errMessage);
             byte[] bytes = outPumper.getBytes(); 
 
             String notifyMessage = "";