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If Axxon PSIM is unloaded, the callback function receives a message with an action parameter value of DISCONNECTED:
ACTIVEX|12|EVENT|SOCKET<>,MMF<>,objaction<DISCONNECTED>,TRANSPORT_TYPE<MMF>,core_global<1>, action<DISCONNECTED>, module<psim_host.exe>, objtype<SLAVE>,__slave_id<SLAVAXP.12>, objid<SLAVAXP>,owner<SLAVAXP>,TRANSPORT_ID<1111>,time<12:41:16>,date<23-09-02>
The message contains the name of the computer on which Axxon PSIM was unloaded and the date and time.