Post the code not just textLayer.textItem.justification by itself that would generate something like textLayer is undefined...

Are all layers in the Text LayerSet text layers, the contain text and what version of Photoshop are you using?

The file only contains pointtext text layers so there is no justification. Any values you are getting are spurious and missleading.

Thanks for that Mike, I was under the impression that textItem.position is where the text started in pointtext makeing justification irrelevant?

Doesn't make any difference for me Mike, textItem.position is always the same and the text does start at that position. I must be missing something?

//#target photoshop
var FontName = "Arial"; 
var FontSize = 14;
var black = new SolidColor(); 
black.rgb.hexValue = '000000'; 
var startRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
app.documents.add(600,400,72,"Justification Example");
var newTextLayer = activeDocument.artLayers.add(); 
newTextLayer.kind = LayerKind.TEXT; 
newTextLayer.textItem.kind = TextType.POINTTEXT
newTextLayer.textItem.color = black; 
newTextLayer.textItem.font = FontName;
newTextLayer.textItem.size = FontSize; 
newTextLayer.textItem.contents = "The quick brown fox jumps over the lazy dog!";
newTextLayer.textItem.position = Array(20, 20); 
newTextLayer.textItem.justification=Justification.CENTERJUSTIFIED; 
$.writeln(newTextLayer.textItem.position);
app.documents.add(600,400,72,"Justification Example");
var newTextLayer = activeDocument.artLayers.add(); 
newTextLayer.kind = LayerKind.TEXT; 
newTextLayer.textItem.kind = TextType.POINTTEXT
newTextLayer.textItem.color = black; 
newTextLayer.textItem.font = FontName;
newTextLayer.textItem.size = FontSize; 
newTextLayer.textItem.contents = "The quick brown fox jumps over the lazy dog!";
newTextLayer.textItem.position = Array(20, 20); 
newTextLayer.textItem.justification=Justification.LEFTJUSTIFIED; 
$.writeln(newTextLayer.textItem.position);
app.documents.add(600,400,72,"Justification Example");
var newTextLayer = activeDocument.artLayers.add(); 
newTextLayer.kind = LayerKind.TEXT; 
newTextLayer.textItem.kind = TextType.POINTTEXT
newTextLayer.textItem.color = black; 
newTextLayer.textItem.font = FontName;
newTextLayer.textItem.size = FontSize; 
newTextLayer.textItem.contents = "The quick brown fox jumps over the lazy dog!";
newTextLayer.textItem.position = Array(20, 20); 
newTextLayer.textItem.justification=Justification.RIGHTJUSTIFIED; 
$.writeln(newTextLayer.textItem.position);

It doesn't work like that for me Mark, see what you get with the above code.

Paul… knock the word JUSTIFIED off each of your samples i.e. use just LEFT, RIGHT & CENTRE… This is what I meant in my previous post… What you have is JUSTIFIED type where left, right & centre are just how the last paragraph is treated… does that make sence? Sorry my painting is getting bad ( a couple of beers watching footy )

Paul, what I noticed is your script does NOT fail nor kick any error but if you look at the paragraph palette nothing is highlighted… Where as with my edits I get the darker icons… My guess is without a bounding box how does it JUSTIFY nothing to fit to… just one of those things…

I had a look at your sample file but I also don't have the fonts used so I could not test getting the justification.

I am not sure I understand your last question. I would think that the try/catch for var align = textLayer.textItem.justification.toString().replace(/Justification./, ''); is catching the same error that started this thread. I don't understand where 'exportData' comes from.