Calculated Applescript to rename a file in Finder (produces error)

[peter1015 0]

I am trying to create a calculated Applescript that imply renames a file in the Finder.

The Applescript itself works fine:

tell application "Finder"

       set fileAlias to (POSIX file "Users/username/test.jpg") as alias

       set the name of fileAlias to "test2.jpg"

end tell

but the calculated Applescript does not:

" tell application \"Finder\"¶

      set fileAlias to \(POSIX file \"Users\/username\/test.jpg\"\) as alias¶       -- test will be replace by a variable

      set the name of fileAlias to \"test2.jpg\"¶

end tell "

(I have tried various iterations with escapes etc but none so far worked;

I am using the POSIX path because it was the first that worked (others didn't).

I always get the error message "Expected expression but found unknown token" (error -2741)

Help appreciated!

Thanks,

[comment 1,817]

See if these can help:

https://fmforums.com/topic/103544-how-to-filemaker-pro-advanced-calculated-applescript/?tab=comments#comment-469892

https://fmforums.com/topic/105576-quotation-marks-in-a-calculated-applescript/?tab=comments#comment-477640

https://fmforums.com/topic/106820-calculated-applescript-syntax/?tab=comments#comment-482614