Hello, if you are on a platform other than Windows2003 or Mac OS X, you could help verify the chmod command issued from java. Please let us know if you experience problems. - unzip the contents of the .zip file ChmodTest.zip to a temporary directory This should result in 4 small .class files in org/python/util/install: ChildProcess.class ChildProcess$StderrMonitor.class ChildProcess$StdoutMonitor.class ChmodTest.class Sources of these are checked in here: installer/src/java/org/python/util/install/ChildProcess.java installer/test/java/org/python/util/install/ChmodTest.java - cd to the temporary directory - java -cp . org.python.util.install.ChmodTest 755 This should create an empty file chmod.test in the temporary directory, with mode 755 - make more subsequent calls of the ChmodTest any call with a mode as argument will change the mode of the existing file. Example: java -cp . org.python.util.install.ChmodTest 644 Please find my sample session from a Mac OS X terminal below: Last login: Wed Nov 9 00:23:11 on console Welcome to Darwin! ibook:~ ohumbel$ cd temp ibook:~/temp ohumbel$ ls org ibook:~/temp ohumbel$ java -version java version "1.4.2_09" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_09-232) Java HotSpot(TM) Client VM (build 1.4.2-54, mixed mode) ibook:~/temp ohumbel$ java -cp . org.python.util.install.ChmodTest 644 [ChildProcess] command 'chmod 644 /Users/ohumbel/temp/chmod.test' is now running... [ChildProcess] ended normally [ChmodTest] chmod command executed on /Users/ohumbel/temp/chmod.test ibook:~/temp ohumbel$ ls -l total 0 drwxrwxrwx 4 ohumbel ohumbel 136 Nov 9 00:29 org -rw-r--r-- 1 ohumbel ohumbel 0 Nov 9 00:31 chmod.test ibook:~/temp ohumbel$ java -cp . org.python.util.install.ChmodTest 755 [ChildProcess] command 'chmod 755 /Users/ohumbel/temp/chmod.test' is now running... [ChildProcess] ended normally [ChmodTest] chmod command executed on /Users/ohumbel/temp/chmod.test ibook:~/temp ohumbel$ ls -l total 0 drwxrwxrwx 4 ohumbel ohumbel 136 Nov 9 00:29 org -rwxr-xr-x 1 ohumbel ohumbel 0 Nov 9 00:31 chmod.test ibook:~/temp ohumbel$