error while using gdb

Hi,

While using gdb  I have set the break pt for the function and 

Going through line by line using next command after a certain line

I got the following error 

 

(gdb) n

0x2afec870 in ?? () from /usr/syrah/lib/libnetsnmpmibs.so.15

 

 

Could any one suggest me what this out put is ? After this line 

I am not able to print my previous symbol while printing  them

I am getting "no symbol in current contex" msg.  

 

 

(gdb)  print ptr_nodes

No symbol "ptr_nodes" in current context.

 

 

Thanks...



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