those are CLI return codes for marimba runchannel on UNIX . The return codes are 0, for success, and -1 through -12, for failure, as described below. 0 - runchannel -help was requested (and provided). A channel was started and completed an operation successfully. 1 - In the tuner's installation directory, the properties. txt file was missing from the lib/tuner/ directory. There was an incorrect runchannel command-line argument. An exception occurred while trying to start the tuner. There were notifications related to channel exceptions, RPC Disconnects, or RPC timeouts. 2 - An unexpected exception was caught. An associated stack trace gives more details. If you see this code while publishing a signed channel, then make sure that the cert DN (certificate's distinguished name) is specified correctly. 3 - Command was canceled. 4 - I/O error. Log entries should give more details, but this error can mean that the command failed to get data channel properties (that is,