While upgrading my IOS, I was getting the error message that there is not enough space available for the new IOS. I was issuing the following command:

Certhacker#copy tftp flash:
Address or name of remote host [192.168.1.1]?
Source filename [c2600-i-mz.121.T.bin]? c2600-i-mz.121-1.T.bin
Destination filename [c2600-i-mz.121-1.T.bin]?
Loading c2600-i-mz.121-1.T.bin from 192.168.1.1 (via Serial0/0): !
%Error copying tftp://192.168.1.1/c2600-i-mz.121-1.T.bin (Not enough space
on device)
Certhacker#

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