`my_qammod' undefined near line ...

[Ashok Kumar]

Hi,
I am using Octave with QtOctave.
I got the following error message when I called the library function
'qamdemod'.
What could be the problem?

debug> error: `my_qammod' undefined near line 35 column 9

error: evaluating assignment expression near line 35, column 7

error: called from `qamdemod' in file
`C:\Octave\QtOctave\octave\share\octave\p

ackages\communications-1.0.4\qamdemod.m'


Thanks and Regards
Ashok
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