Error "No source file named"

Hi

When I want to set a breakpoint at a specific line number, I get the following error:

(gdb) break /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/src/gpgpu-sim/shader.cc:1656
No source file named /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/src/gpgpu-sim/shader.cc.
Make breakpoint pending on future shared library load? (y or [n])


However, that line exists.

$ sed -n 1656p /home/mahmood/accel-sim-framework/gpu-simulator/gpgpu-sim/src/gpgpu-sim/shader.cc
    printf("[Mahmood:shader.cc:1655] %" PRIu64 "\n", localaddr);



Any idea about that?

Regards,
Mahmood