17 (0x11) Request refused by the CG module
The ALP module that handles the request has refused it.
The CG modules refuse the request if they determine that they are unable to
process it. Usually the CG modules begin the request processing and report an
error, sometimes the request data is not enough to even begin the processing and
then this error is reported.
This may indicate wrong parameters, configuration of the module parameters
for the file type processed and so on.