[iText-questions] Illegal operation 'Tm' outside a text object using DirectUnderContent

[SALERNI ACHILLE]

I need to put in each page of my Pdf a text as background, using getUnderContent, I read in archive that Illegal operation 'Tm' outside a text object is generated by a wrong position in code but I don't understand where I have to put it, because I don't have direct call to beginText and endText() . This error is generated just if i try to write in underContent.

 

 

 

..............
Document document = new Document();

 

try{

 

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(namePdf));

Phrase p = null;

 

document.open();

 

Font courier8 = new Font(Font.COURIER, 8);
Font courier8b = new Font(Font.COURIER, 8);
courier8b.setStyle(Font.BOLD);
bf= BaseFont.createFont("c:\\windows\\fonts\\arialuni.ttf", BaseFont.IDENTITY_H, true);

 

Chunk c = new Chunk(riga_norm, courier8);//riga_norm is a string
Chunk cb = new Chunk(riga_bold, courier8b);//riga_bold is a string

 

 p = new Phrase(10, "");
 p.add(cb);
 p.add(c);  

 

if (newPage){

    document.newPage();

 

    /////////////////////////////////////////////////////////////////////part that produce the error
     PdfContentByte under = writer.getDirectContentUnder();
     under.setColorFill(new Color(220, 220, 220));
     under.setFontAndSize(bf, 36);
     under.showTextAligned(Element.ALIGN_LEFT, "TEXT", 50, 50, 55);
     under.fill();
    ////////////////////////////////////////////////////////////////////

}
else
 document.add(new Paragraph(p)); 

 

}
} catch (DocumentException de) {
  System.err.println(de.getMessage());
 } catch (IOException ioe) {
  System.err.println(ioe.getMessage());
 }

 

 
 document.close();

 

.......................

 

 

 

Best regards

Achille Salerni