Using variable on next script in same session

thanks, how stupid of me!

now every thing seems to be working until i get to saving the file
and i get this error:
Writing data to a file.
An error occurred while writing the data to a file: null

this is the code for outputting the file

outputFile = "testing.csv";

// Error catching.
try
{
//the following code is necessary to set up the file to be written to.
File file = new File( outputFile );
fileExists = file.exists();

// Open up the file to be appended to.
out = new FileWriter( outputFile, true );
session.log( "Writing data to a file." );

// Write columns.
out.write( session.getVariable( "cname" )+ "," );
out.write( session.getVariable( "cstreet" )+ "," );
out.write( session.getVariable( "cstreet2" ) + "," );
out.write( session.getVariable( "ctown" )+ "," );
out.write( session.getVariable( "cpostcode") + "," );
out.write( session.getVariable( "cphone" )+ "," );
out.write( session.getVariable( "cfax" )+ "," );
out.write( session.getVariable( "ctitle" )+ "," );
out.write( session.getVariable( "intials" )+ "," );
out.write( session.getVariable( "csurname" )+ "," );
out.write( session.getVariable( "cjob" )+ "," );
out.write( session.getVariable( "cemail" ) );

out.write( "\n" );

// Close up the file.
out.close();

// Clear variables. you only need to clear session variables because dataRecord variables don't persist
session.getVariable( "cname","");
session.getVariable( "cstreet","");
session.getVariable( "cstreet2","");
session.getVariable( "ctown","");
session.getVariable( "cpostcode","");
session.getVariable( "cphone","");
session.getVariable( "cfax","");
session.getVariable( "ctitle","");
session.getVariable( "intials","");
session.getVariable( "csurname","");
session.getVariable( "cjob","");
session.getVariable( "cemail","");

}

catch( Exception e )
{
session.log( "An error occurred while writing the data to a file: " + e.getMessage() );
}