hello Johanes, thank you for replying my question.

I'm sorry "Could not create a temporary file" is the right message. I wrote it wrongly. what's is the meaning of this message and how to solve it ?

Am 28.05.2014 15:32, schrieb magda lena:

...

what() : could not create a temporary name

Is that the correct error message? Or say it "Could not create a temporary file" instead?

thank you :)