Script not working in cs6, after working in cs5

Question

Hello,
I have a script and when I try to access app.documents.length
or app.documents[0] or app.activeDocument
then I get the error:
General photoshop error occurred. This functionality may not be available in this version of Photoshop
- <no additional info is available>
any idea ?
Thanks

Answer 1

Thanks Paul,
My script is like this:
<javascriptresource>
<name>$$$/JavaScripts/ExportGeotiff/Menu=Export Geotiff...</name>
<about>$$$/JavaScripts/ExportGeotiff/About=Export Geotiff ^r^rCopyright 2011 Company. All rights reserved.^r^rExports document into a Geotiff image.</about>
</javascriptresource>
try
alert("OK HERE");
exportGeoTiff();
catch(err)
alert(err.description);
function exportGeoTiff()
if (app.documents.length == 0) //***** CRASHES HERE
  error("No document to export.");
var scriptPath = getScriptPath();
var geotifcp = getGeotifcp(scriptPath);
var doc = app.activeDocument;
var geo = getGeoInfo(doc);
var inputGeoFile = saveGeoInfo(scriptPath, geo);
var file = saveDoc(doc);
var inputTiffFile = prepareInputTiff(scriptPath, file);
var outputTiffFile = runGeotifcp(geotifcp, scriptPath, file);
inputTiffFile.remove();
inputGeoFile.remove();
outputTiffFile.remove();
function error(err)
throw new Error(err);
function getScriptPath()
var path = "C:\\Program Files (x86)\\Company\\Common\\Maps\\";
var folder = Folder(path);
if (!folder.exists)
  path = "C:\\Program Files\\Company\\Common\\Maps\\";
folder = Folder(path);
if (!folder.exists)
  error("Could not find map common folder.");
return path;
function getGeotifcp(path)
var geotifcp = File(path + "geotifcp.cmd");
    if (!geotifcp || !geotifcp.exists)
  error("Could not find geotifcp utility.");
return geotifcp;
function getGeoInfo(doc)
var raw = doc.xmpMetadata.rawData;
var tag = "xmpMM:RenditionParams>";
var geo = raw.substring(raw.indexOf("<" + tag) + tag.length + 1, raw.indexOf("</" + tag));
if (!geo || (geo.length == 0))
  error("Document has no Geo-Reference information. Export cancelled.");
//escape XML:
    geo = geo.replace(/&#xA;/g, "\r\n");
return geo;
function saveGeoInfo(path, geo)
var inputGeoFile = File(path + "input.geo");
    if (!inputGeoFile)
  error("Could not create geo input file.");
if (!inputGeoFile.open("w"))
  error("Could not open geo input file.");
if (!inputGeoFile.write(geo))
  error("Could not write to geo input file.");
if (!inputGeoFile.close())
  error("Could not close geo input file.");
return inputGeoFile;
function saveDoc(doc)
var file = File.saveDialog("Save As", "Tiff:*.tif");
if (!file)
  error("Save cancelled");
doc.saveAs(file, new TiffSaveOptions(), true, Extension.LOWERCASE);
if (file.length == 0)
  error("Saving to tiff failed. Export cancelled.");
return file;
function prepareInputTiff(path, file)
var inputTiffFile = File(path + "input.tif");
    if (!inputTiffFile)
  error("Could not create input file.");
if (inputTiffFile.exists)
  if (!inputTiffFile.remove())
   error("Could not delete input file.");
if (!file.copy(inputTiffFile.fsName))
  error("Could not copy image to input file.");
if (!inputTiffFile.exists)
  error("Problem copying image to input file.");
return inputTiffFile;
function runGeotifcp(geotifcp, path, file)
if (!geotifcp.execute())
  error("Failed adding geo info to tiff.");
$.sleep(1000);//let geotifcp finish
var outputTiffFile = File(path + "output.tif");
    if (!outputTiffFile || !outputTiffFile.exists)
  error("Could not create geotiff file.");
if (!outputTiffFile.copy(file.fsName))
  error("Failed replacing tiff image with Geotiff version.");
return outputTiffFile;