[FFmpeg-user] ffserver start error

root@ubuntu:/etc# ffserver start ffserver version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3) configuration: libavutil 55. 17.103 / 55. 17.103 libavcodec 57. 24.102 / 57. 24.102 libavformat 57. 25.100 / 57. 25.100 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 31.100 / 6. 31.100 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.101 / 2. 0.101 Abortado (`core' generado) root@ubuntu:/etc# the ffserver.conf file is correct, what can I be doing wrong?