I have a CE-350 and I never had this problem but on the rare occasion that I do have trouble I delete the program from my computer and reinstall it. This has helped me. good luck.
Has she tried test stitching other designs of the same size to see what happens? I have an older CE-100 that had a similar problem, and it turned out that the belt in the arm had become crimped and torn slightly, causing it to not complete stitching. The belt had to be replaced at the shop.
Yes. She is afraid that the PES format is what is giving her trouble...but she has been able to sew other PES formats. There are some other quirky things...but can't say if it is the thread, stabilizer, software, design, etc. We are both so new at embroidery. I know one of her font choices...that creates 'fuller' letters...sews as much embroidery thread under the fabric as above the fabric. But that doesn't happen with everything, so I don't think it is the tension of her threads...I wondered if it was the font design, or if it was a quirk that we needed to tweek somewhere else. I can't remember other things right now...but just thought I'd open a dialog and see if I could help a friend.
thank you so much for your quick response. I have never thougth about replacing belts in a machine. Man...this world is so big.