Error converting file... message
In the Main settings tab see if you have one or both of the "Saved Image 1 or 2" set to save to a valid location. This can also occur if the Save Originals option set to an invalid location. If you have that set to a thumb drive, for example, that is not plugged in you will get that message. You can also get that error if you are using a third party software to monitor a saved image folder and that software tries to open the file to soon before we are through saving it. If you disable any third party software and the issue goes away contact that software maker. A less common but possible cause is from a timing setting set to short to allow the save to complete. After solving the original cause you may need to clear the queue of jobs waiting by pressing F11 and deleting all jobs there.