Exception "class com.aspose.imaging.coreexceptions.ImageSaveException: Image export failed. " while spliting TIFF into multiple chunks using Aspose.Imaging for Java

Aspose.Imaging Product Family
1

Hi Team,
We are trying to split tiff file into mutiple chunks using Aspose.Imaging.
But we are facing below error. Could you please asssist us on this.
“StackTrace”:"class com.aspose.imaging.coreexceptions.ImageSaveException: Image export failed. —> java.lang.NullPointerException: Cannot invoke "com.aspose.imaging.internal.mh.g.j()" because "" is null\n — End of inner exception stack trace —\ncom.aspose.imaging.Image.a(Unknown Source)\ncom.aspose.imaging.RasterImage.a(Unknown Source)\ncom.aspose.imaging.Image.save(Unknown Source)\ncom.aspose.imaging.Image.save(Unknown Source)
R1_4765.zip (2.3 MB)

2

@ashokreddyd, thank you for your request. Could you please provide the code you use to do this?

3

Thanks for responding. Please find below lines of code.

	TiffImage tiffImage = (TiffImage) Image.load(imagePath);
	TiffImage output = null;
	int counter = 1;
	for(TiffFrame tiffFrame : tiffImage.getFrames()) {
		tiffImage.setActiveFrame(tiffFrame);
		if(output == null){
			output = new TiffImage(TiffFrame.copyFrame(tiffImage.getActiveFrame()));
		} else {
			output.addFrame(TiffFrame.copyFrame(tiffImage.getActiveFrame()));
		}
		if(counter % ocrBatchSize == 0){
			output.save(fileName.toString(), options);
			fileName = Paths.get(getUUIDFileName(outputDirectory.toString(), ".tif"));
			filePaths.add(fileName.toString());
			output.close();
			output = null;
		}
		counter++;
	}
4

Hi, @ashokreddyd

Firstly,
In your code I can see 1 potential error that can lead to this error.

```
if(counter % ocrBatchSize == 0){
                        // Here fileName is null and the following line throws exception NullPointer
			output.save(fileName.toString(), options);
                       // fileName must be defined before save
			fileName = Paths.get(getUUIDFileName(outputDirectory.toString(), ".tif"));
			filePaths.add(fileName.toString());
			output.close();
			output = null;
		}
```

Please, try the following code

TiffImage tiffImage = (TiffImage) Image.load(imagePath);
	TiffImage output = null;
	int counter = 1;
	for(TiffFrame tiffFrame : tiffImage.getFrames()) {
		tiffImage.setActiveFrame(tiffFrame);
		if(output == null){
			output = new TiffImage(TiffFrame.copyFrame(tiffImage.getActiveFrame()));
		} else {
			output.addFrame(TiffFrame.copyFrame(tiffImage.getActiveFrame()));
		}
		if(counter % ocrBatchSize == 0){
			fileName = Paths.get(getUUIDFileName(outputDirectory.toString(), ".tif"));
			output.save(fileName.toString(), options);
			filePaths.add(fileName.toString());
			output.close();
			output = null;
		}
		counter++;
	}
5

Secondly, If you need only to save each frame in the separated files, you can simplify your code.
Please, take a look at the following example:

try (TiffImage tiffImage = (TiffImage) Image.load(imagePath)) {
	for(TiffFrame tiffFrame : tiffImage.getFrames()) {
		fileName = Paths.get(getUUIDFileName(outputDirectory.toString(), ".tif"));
		tiffImage.save(fileName.toString(), options);
		filePaths.add(fileName.toString());
	}
}
6

Thank you for the inputs Evgeniy .
We will look into it and come back to you if we have any further queries.

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