Error codes

100 - unspecified error

101 - file not found
102 - directory not found
103 - executable not found
104 - variable not found

105 - env unpacking failed
106 - se copy error
107 - killed by batch system
108 - output invalid

120 - lower space limit reached
121 - upper space limit reached
122 - min size failure

123 - user intervention requested

>125 - reserved by POSIX