Hi, pjsip team. First, I would like to thank you for the huge job you did with pjsip. That's why it is a really handy and useful library with good potential. Now, my question: I am using pjsua2 with python. I have noticed, that after calls are completed and corresponding transactions are terminated media resources (ie recorders) are not freed, so after application stops, i see "Pool is not released by application" messages. I have read, that resources are freed after 32 seconds, but my app stops much later. Details are here: 18:35:18.204 dlg0x7f9e4402a .Received Request msg BYE/cseq=102 (rdata0x7f9e44028308) 18:35:18.204 tsx0x7f9e4404b ...Transaction created for Request msg BYE/cseq=102 (rdata0x7f9e44028308) 18:35:18.204 tsx0x7f9e4404b ..Incoming Request msg BYE/cseq=102 (rdata0x7f9e44028308) in state Null 18:35:18.204 tsx0x7f9e4404b ...State changed from Null to Trying, event=RX_MSG 18:35:18.204 dlg0x7f9e4402a ....Transaction tsx0x7f9e4404b288 state changed to Trying 18:35:18.204 endpoint .....Response msg 200/BYE/cseq=102 (tdta0x7f9e4404b9f0) created 18:35:18.204 dlg0x7f9e4402a ......Sending Response msg 200/BYE/cseq=102 (tdta0x7f9e4404b9f0) 18:35:18.204 tsx0x7f9e4404b ......Sending Response msg 200/BYE/cseq=102 (tdta0x7f9e4404b9f0) in state Trying 18:35:18.205 tsx0x7f9e4404b .......State changed from Trying to Completed, event=TX_MSG 18:35:18.205 dlg0x7f9e4402a ........Transaction tsx0x7f9e4404b288 state changed to Completed 18:35:50.190 tsx0x7f9e4402b !Timeout timer event 18:35:50.191 tsx0x7f9e4402b .State changed from Completed to Terminated, event=TIMER 18:35:50.192 tsx0x7f9e4402b Timeout timer event 18:35:50.192 tsx0x7f9e4402b .State changed from Terminated to Destroyed, event=TIMER 18:35:50.192 tdta0x7f9e4402 ..Destroying txdata Response msg 200/BYE/cseq=102 (tdta0x7f9e4402c8f0) 18:35:50.192 tsx0x7f9e4402b Transaction destroyed! 18:35:50.205 tsx0x7f9e4404b Timeout timer event 18:35:50.205 tsx0x7f9e4404b .State changed from Completed to Terminated, event=TIMER 18:35:50.205 dlg0x7f9e4402a ..Transaction tsx0x7f9e4404b288 state changed to Terminated 18:35:50.205 tsx0x7f9e4404b Timeout timer event 18:35:50.205 tsx0x7f9e4404b .State changed from Terminated to Destroyed, event=TIMER 18:35:50.205 tdta0x7f9e4404 ..Destroying txdata Response msg 200/BYE/cseq=102 (tdta0x7f9e4404b9f0) 18:35:50.205 tsx0x7f9e4404b Transaction destroyed! And at the app shutdown: 18:39:57.355 dlg0x7f9e4402a .Pool is not released by application, releasing now Maybe I need to destroy dialogs in some exclusive way? -- Regards, Denis