Hi,
You have to use the correct function.
There is no function "Count", but a function "count".
Manual:
count count the number of answered (non-blank) questions in the list number count(arg1, arg12, ..., argN)
Hint: If an equation doesn't seem to work as expectd, write it into a text display question, e.g. your
{Count(that.Q1)}
You will get this with the explanation "undefined function"
And: which version do you use really?
There is no version 2.5.
Either it is 2.05 or one of the branch 2.50.x-2.73.x
Joffm