unable to view symbols in gdb

Hi,
I am debugging a fortran code. I have set a breakpoint just after a
line

CPU_2=0

I am getting the message

(gdb) print *CPU_2
No symbol "CPU_2" in current context.

it's the same for other symbols deined before this.

OTHER INFO
compiler: g95 Options: -g -ggdb -ftrace=full
OS: Mac OS X
front-end: ddd
importrant libraries: MPI
I am able to view the source code

thanks in advance

.

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