Hi, I'm just starting to write my code for gegl, I spent the whole day to debug but failed. My code(svn 2287) can be found on http://svn.gnome.org/viewvc/gegl/branches/branch_zhangjb/ . Here is some messages from gdb. (gdb) > run Starting program: /home/bear/GSoC2008/workspace/gegl/tests/frequency/gegl_test [Thread debugging using libthread_db enabled] [New Thread 0xb7f67940 (LWP 9228)] [Switching to Thread 0xb7f67940 (LWP 9228)] Breakpoint 1, main (argc=1, argv=0x0) at hello-world-fourier.c:34 34 gegl_node_process(display); (gdb) > s 1910 1462 pad = gegl_node_get_pad (node, pad_name); (gdb) > s 1464 if (pad && (gdb) > s 1478 } (gdb) > s gegl_node_set_operation_object (self=0x8060d90, operation=0x804f2c8) at gegl-node.c:1064 1064 gegl_node_disconnect_sources (self); (gdb) > s Program received signal SIGSEGV, Segmentation fault. 0x45b3bc8e in ?? () from /usr/lib/libfftw3.so.3 (gdb) Could you give a student some suggests? :) Thank you. Regards, Zhang _______________________________________________ Gegl-developer mailing list Gegl-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gegl-developer