• System usage: #define QUERY_SUBSYSTEM 170
• Application usage: #define APP_QUERY_SUBSYSTEM -1170
• Processed by: core services bus (_bonds)

Description:

message := "<method> <subsystem>"; report <subsystem> status via <method> (using format of message 18)

Fixed in 8.4.2 (12.1m1) so that <subsystem> is always in the bitmask format.