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  1. Every time Hudson launches a program locally/remotely, it prints out the command line to the log file. So when a remote execution fails, login to the computer that runs the master by using the same user account, and try to run the command from your shell. You tend to solve problems quickly in this way.
  2. Each slave has a log page showing the communication between the master and the slave agent. This log often shows error reports.
  3. If you use binary-unsafe remoting mechanism like telnet to launch a slave, add the -text option to slave.jar so that Hudson avoids sending binary data over the network.
  4. When the same command runs outside Hudson just fine, make sure you are testing it with the same user account as Hudson runs under. In particular, if you run Hudson master on Windows, consult How to get command prompt as the SYSTEM user.
  5. Feel free to send your trouble to users@hudson.dev.java.net