[TxMt] prefixing TM_PROJECT DIRECTORY in applescript

Within a snippet, I am trying to prefix the $TM_PROJECT_DIRECTORY to a file name in applescript (but I am not sure how TM environment variables & files are concatenated into the applescript world?).

In essence, the file textmatetostata.do is created (from textmate) by default in the $TM_PROJECT_DIRECTORY. The problem is that when stata activates it cannot find it - since it opens in a different directory by default. What I am trying to do is as below: (but this is failing!)

query=${TM_SELECTED_TEXT:-$TM_CURRENT_LINE} echo "$query" > textmatetostata.do

osascript -e "tell application "Stata" activate open POSIX file {$TM_PROJECT_DIRECTORY} & "textmatetostata.do" end tell"

- thanks danstan