To set image in paintview invalid context 0x0 error is shown?

Hi, i want to do undo operations in paintview so i can set multiple images in a paintview but when i set image in a paintview i get following error

<Error>:CGContextSaveGState: invalid context 0x0 <Error>: CGContextSetBlendMode: invalid context 0x0 <Error>: CGContextSetAlpha: invalid context 0x0 <Error>: CGContextTranslateCTM: invalid context 0x0 <Error>: CGContextScaleCTM: invalid context 0x0

through user questions i have used to save file in a Application directory. get image from it but again i got this error.

paintView.addEventListener('touchend',function(e) { paintimage = paintView.toImage(); imagearray.push(paintimage);

            // var filename = imagearrayval+"savedPainting.jpg";
            savePaintImage(paintimage,filename);

    });

var savePaintImage = function(imageBlob,filename) { var file = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,filename); file.write(imageBlob); }

      var getPaintImage = function(imagearrayval)
      {
            var getfilename = imagearrayval+"savedPainting.jpg";
            var file = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,getfilename);
            if(!file.exists()){
                return 'File not found.';
            } else {
                return Titanium.Filesystem.applicationDataDirectory+getfilename;
            }
         } 

i get image by calling getPaintImage() method

var file = getPaintImage(imagearrayval);