Krishna,

I believe the error is arising because of the last line:
Code:
1,1,0,0,1,~Please specify the location of the chocolate that you want to choose by providing position from the top and position from the left,rt:text,*
The above text is missing a location value. I think it may work if it reads:
Code:
1,1,0,0,1,~Please specify the location of the chocolate that you want to choose by providing position from the top and position from the left,"0,0,1",rt:text,*
I hope that helps,
Trevor