gdb question?

[Fenglou Mao]

Dear all,
     When I want to print some variable, sometimes gdb always told me "no 
such symbol", but I am sure it must have that symbol, and it have been
used, and it must be in current namespace. 
     I want to know if some else met this question and how to 
resolve it.

Sincerely Yours,

FengLou Mao
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ADD:Mr. FengLou Mao
    Peking University
    BeiJing
    P.R.China
Tel:86-10-62751490
Fax:86-10-62751725