goico@trueno:~/AMC$ gdb --args /opt/local/lib/AMC/exec/AMC-detect -x 2480.31494396015 -y 3507.87397260274 -d 42.519511994409 -p 0.2 -m 0.2 -t 0.6 -o 1
GNU gdb 6.3.50-20050815 (Apple version gdb-1824) (Wed Feb  6 22:51:23 UTC 2013)

... [gdb messages omitted]

(gdb) run  
Starting program: /opt/local/lib/AMC/exec/AMC-detect -x 2480.31494396015 -y 3507.87397260274 -d 42.519511994409 -p 0.2 -m 0.2 -t 0.6 -o 1
Reading symbols for shared libraries +++++........................................warning: Could not find object file "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_archivers_bzip2/bzip2/work/bzip2-1.0.6/blocksort.o" - no debug information available for "blocksort.c".

... [several similar warnings omitted]

warning: Could not find object file "/opt/local/var/macports/build/_opt_mports_dports_security_p11-kit/p11-kit/work/p11-kit-0.22.1/./.libs/libp11-library.a(library.o)" - no debug information available for "library.c".

... done
TX=2480.31 TY=3507.87 DIAM=42.52
load /Users/goico/AMC/k/scans/t6_0000.tif

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x000000010730e180
0x0000000100618adc in put1bitbwtile ()
(gdb)