This article explains how to fix a file that when launched in RS appears to have the wrong canvas size. Option 1: Open the file in Photoshop and go to image>trim. Choose how you want to trim and click OK. Save the file in PS. Click Run on the RS panel to re-open the file in RS.
Option 2: Open the file in Photoshop. Copy the entire artwork into a new file. Copy all the layers together or the entire canvas and then go to file>new so that the clipboard will automatically make the new file the same image size. Save the new file in PS. Click Run on the RS panel to re-open the file in RS.
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