Error "Can't get every item of ..."

[jupite...@gmail.com]

I have a script that worked find in Tiger but it gives me an error
after I upgraded to Leopard 10.5.8. I'm not sure how to fix it.

The script is supposed to make a list of dates that I can choose from.
Here it is:

repeat with curyear in myyear
repeat with curmonth in mymonth
repeat with curdate in mydate
set mytemp to curmonth & " " & curdate & ", " & curyear
set myjournal to (every item of myjournal) & mytemp
end repeat
end repeat
end repeat

But now I get an error saying:

"Can’t get every item of \"\"."

Help please!