TAPI problem with third party device control in IPO 9.0

[chinq]

Hello,
I wrote a program that used TAPI version 2 to control extension. It can't work with third party mode although our IPO system has CTI Link Pro license (the function openLine returns LINEERR_OPERATIONFAILED). With single mode, the program works normally.

Thanks,

[oiduran]

What is your version of IPO?

[havel3]

As in the initial question : version is 9.0 but that doesn't matter here.
Is your app able to use multithreading? Because in third party mode you must start a session for each station, in single mode you have only one session. So if you have 150 stations you will have 150 sessions within TAPI and each session generates events etcetera to monitor and take action on that.
Quite complex I can tell you that, Keep a keen eye at the use of resources on the PC.