[Guy Harris <guy@xxxxxxxxxxxx>]

Anders Broman wrote:

> If the request isn't in the trace it's not possible to decode the response
> as the command code is unknown(not present).

Presumably in that case the dissector would indicate that the command 
code is unknown because the corresponding request isn't in the trace, 
not that there's no dissector for the command code.  (If not, that needs 
to be fixed.)