EMS not found
 Error loading program
 File I/O error
 Help not found
 Illegal execution
 Insufficient memory to complete operation
 Internal error
 Invalid option
 Invalid symbol table
 Invalid symbol table type
 Invalid symbol table version
 Memory low
 No program loaded
 Non-text file selected
 Program already terminated
 Program has no symbol table
 Program not found
 Program will restart
 Search string not found
 Symbol not found
 Symbol table corrupted