stack can write to prefs-folder, and cannot!?

[Klaus major-k]

Hi friends,

another mistery with my "uncompilable" stack. :-/

The stack created a subfolder in specialfolderpath("preferences") (Mac only!)
and two more subfolders in that folder, so the pathnames are:
tAppData -> specialfolderpath("preferences") & "/nameofapp/appdata/
tUserData -> specialfolderpath("preferences") & "/nameofapp/userdata/

At one point the stack writes some data:
...
put tValue into url("binfile:" & tAppData & tName & ".prf")
## No problem
...
Same stack at another point:
...
export snapshot from xxxxxx to file (tUserData & "XXX") as JPEG
## And I get: can't open file
???

If I create a button in hte same stack with this script:
...
on mouseup
  put "sdsdsdsdd" into url("file:" & tAppData & "abc.prf")
  put the result
end mouseUp
...
I also get this RESULT: can't open file

After several attempts, I do not even get the error anymore, just no data written!?

What the hell is going on here? What am I overlooking?
Any hints appreciated.


Best

Klaus

--
Klaus Major
http://www.major-k.de
klaus at major-k.de