Getting TransformerException while using JAXP to create the XML

I am getting the below exception while creating the XML file with JAXP
TransformerException XSL-1900: (Fatal Error) An internal error condition occurred.
Please help me to resolve this.

here is my code:


                  
                  

try{
			DocumentBuilderFactory factory1 = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder1 = factory1.newDocumentBuilder();
			Document document1 = builder1.newDocument();
			Element rootElement1 = document1.createElement("DashbUnit");
			rootElement1.setAttribute("id",dbUnitId);
			document1.appendChild(rootElement1);
			for(int i=0;i<counter;i++){
				Element setElement1 = document1.createElement("Param");
				setElement1.setAttribute("name",parNames[i]);
				setElement1.setAttribute("value",parVals[i]);
				rootElement1.appendChild(setElement1);
			}
			TransformerFactory tFactory1 = TransformerFactory.newInstance();
			
			Transformer transformer1 = tFactory1.newTransformer();
			//Add indentation to output
			transformer1.setOutputProperty
			(OutputKeys.INDENT, "yes");
			transformer1.setOutputProperty(
					"{http://xml.apache.org/xslt}indent-amount", "2");
			
			DOMSource source1 = new DOMSource(document1);

			FileOutputStream output1 = new FileOutputStream(new File(fPathParVal));
			StreamResult result1 = new StreamResult(output1);
			transformer1.transform(source1, result1);
      System.out.println("file transfered");
			output1.flush();
			output1.close();
		} catch (IOException e) {
			System.out.println("IOException " + e.getMessage());
		} catch (ParserConfigurationException e) {
			System.out
			.println("ParserConfigurationException " + e.getMessage());
		} catch (TransformerConfigurationException e) {
			System.out.println("TransformerConfigurationException "+ e.getMessage());
		} catch (TransformerException e) {
			System.out.println("TransformerException " + e.getMessage());
		}

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