Thanks,David,about the first problem,i restart the Eclipse,then it's ok.About the little mask,i right click such a model and select Show in Repository...but have no change.
Except the above,i import the Barcode example,A few days ago it goes well and can show barcode,but now it can't show baocode.i re-import the example but it doesn't work,this is the Screenshotdon't show barcode.png
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