Code::Blocks GDB Cannot Open file Error - gdb

Question

I use Code::Blocks 12.11 and Cygwin gdb in Windows 8.
I configured the cygwin gdb in code::blocks, when debug, it reports "cannot open file" error. Using gdb in command line is alright.
I found this discussion from web, but I cannot find the registery entry. My guess is that the Debugger plugin cannot pass a right path name to gdb, there is ">>" in prefix of the path, i copied this into editor and it turns out to be two "sub" charaters (1A in ascii).
Here is the error log, the ">>" is added by hand, because when I copied it here, the "sub" charaters don't show.
Debugger name and version: GNU gdb (GDB) 7.6.50.20130728-cvs (cygwin-special)
Child process PID: 21936
Cannot open file: >>/cygdrive/e/code/test/main.cpp
At >>/cygdrive/e/code/test/main.cpp:17
Debugger finished with status 0
My question is
1.How can I make the gdb work in the Code::Blocks
2.Are the two "sub" charaters normal and why do they appear, how can I remove it.

Answer 1

I made it work by doing the following:
I added a String Value under
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
and
HKEY_LOCAL_MACHINE\Software\Cygnus Solutions\Cygwin\mounts v2
(none of the folders were there, so I had to create them manually by selecting New->Key)
with the following parameters:
name: cygdrive prefix
value: /cygdrive