You left out a lot, like what operating system you are using. But I'll guess that gr_vmcircbuf_createfilemapping is trying to mmap a file in tmp to get shared memory, and it needs to be writable. Perhaps using mfs or tmpfs, or some other kind of memory filesystem for /tmp is in order.
It may be that the diagnostics are not quite right. Try ktrace/truss/etc. -- Greg Troxel <[EMAIL PROTECTED]> _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio