textread error / question

[Rick T]

Greetings All

I'm trying to read in a text file with comma delimited data see text of what's in data.txt below but I keep getting an error

feval: function `print_usage' not found

text1,eq1=a+b*c
text2,eq2=b+c*d
text3,eq3=c+a*a

This the command I use

[names,equation]=textread('data.txt', '%s%s', 'delimiter', ',')

I have the io package installed and I'm using ubuntu 10.04 with octave 3.2.4

Thanks