Lexmark e232 Guida Di Riferimento

You may receive unsolicited messages from your printer. Unsolicited messages use 
the same syntax as status messages. These messages are transmitted sequentially 
as ordinary data through the communication channel, with other characters written to 
a standard output file. These messages are bracketed with 

%%[

 and 

]%%.

%%[

 Error: error type; Offending Command: operator ]%%

The interpreter has detected an 

 while executing 

 and invoked 

handleerror.

%%[ Flushing: rest of job (to EOF) is ignored ]%%

The rest of the current print job is discarded because of a previous error or other 
ending, such as a stop or Ctrl-C. The printer ignores further input until it 
determines the end of the print job.

%%[ exitserver: permanent state may be changed ]%%

The PostScript emulation program has exited successfully from the server 
normal save or restore context; therefore, it can make permanent changes to 
system parameters or virtual memory.