Hi,
First things first.
Open up your document in Design and do a preview, does it work?
Try to use the same data file you are using in your process.
If that works then re-send the document to Watch just to make sure we have the latest document.
Then create a simple process input and output to Image, that should work just fine. If that works then there may be something in your current process that is causing that error. Do you have a splitter?
Make sure that it is splitting correctly before getting to Image.
Let me know how that goes.
Cosimo