Error Handling - InFocus SP5000 Command Line Interface Manual

1.1.7 Error Handling

When the closing parenthesis is received, the command is validated before it is processed. If the
received command is determined to be invalid, a question mark character will be returned as a error
response.
Examples:
(123?)
(VOL ?)
Not all settings are readable. If an attempt is made to read from a write-only setting, the projector will
return a question mark.
Example:
(RST?)
A more descriptive error message on the errors can then be queried with the (ERR?)
command. The following message are defined:
(No Error Detected)
(Unknown command)
(Unknown parameter)
(Command not supported by this projector)
(Command only available in Power on)
(Projector not ready to be turned on)
(Command only available with valid input source)
(Command only available with external module)
(Command failed)
(Write only Command)
(Command only available in RGB)
(Command only available in VIDEO)
(Command only available in NTSC)
"123" is not a valid CLI command prefix. This read request will return '?'
"VOL" is a valid CLI command prefix, but the spaces between the prefix and the
question mark character invalidates the command. This read request will
return '?'.
If the RST CLI command is write only, this read request will return '?'.