I have a simple UserApp form with text and text area fields on it. When
someone puts a " or character in these fields and try to submit the form
they get an error message:

"submission failed": "Error updating flow data"..."illegal character at
line"....

Is it possible to use these "special" characters in these input fields?
Is there a way to escape/encode special characters? In Designer
the "data item mapping - post activity" does not let me modify the
form data before I put it back into the flow variables like the "pre
activity" does.
Is there a way to do this? Thank you.