I'm developing a Symbian C++ application to my nokia 3650. I want to send DTMF tones so that I use this function that belongs to etel3rdparty.h
But when I try to run my application into the mobile phone this warning appears: system error!
I'm sure this error is caused by CTelephony class because if I erase this class my application runs well.
why can't I use this class in nokia 3650?
Thanks in advance.