Hello everybody,
I'm implementing a client via the Remote Control API, but I have a problem with the upload_file function which always return a http error 500 from the server.

More precisely, the error is this:
Unexpected character while parsing value: C. Path '', line 0, position 0.

The point where it goes in error is:

$aFieldMap = createFieldMap ($iSurveyID, 'short', false, false, Yii :: app () -> getConfig ('defaultlang')); (Remotecontrol_handle.php)

$prow = $survey-> getAttributes (); (Common_helper.php)

The attributes array is empty.

Can anyone help me

Thank you
Stefano