>Did you try pjlib-test and pjmedia-test before run pjsua? Yes: using pjlib-test of that distribution, an error of dynamic(?) linking (something like /system/xbin/linker) occurs. >I used pjproject 1.14.2 release version Now I'm trying to use the 2.0 version (it should be more recent than 1.14.2), but I don't know now what to say... I'll list here what I did in order to have another Stop and Segmentation fault from my su shell: - I made the patch (http://digilander.libero.it/MIDISEARCH/android.patch), using the OpenSL as shown in a previous discussion on this mailing list. This patch contains also the configure-android of the pjsip's android branch. - I do "autoconf aconfigure.ac > aconfigure" to generate the updated config file - I run the script ./myConf generated from the patch file - I do "make dep && make" (It uses by default the 5th version of Android Api) - After compilation, i push the binary pjsua etc. to the rooted device. - I execute the binary from /data/local with 0777 permissions - The application is Stopped and then a Sigfault is received The same thing happens on the emulator. Thanks again for your useful advices, M.P.