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MAC computer using 6.9, 7.1, 7.2 version of the astah inside open any diagram will pop up error


java.awt.image.ImagingOpException: Unable to convolve src image at java.awt.image.ConvolveOp.filter( at sun.java2d.pipe.DrawImage.transformImage( at sun.java2d.pipe.ValidatePipe.transformImage( at sun.java2d.SunGraphics2D.drawImage( at$ShadowBorder.paintToImage( at$ShadowBorder.paintBorder( at$SlicedShadowBorder.( at$4.getForegroundShadowBorder( at$InternalFrameShadow.getInstance( at$InternalFrameShadow.getInstance( at$RecyclableSingleton.lambda$get$0( at sun.awt.AppContext.getSoftReferenceValue( at$RecyclableSingleton.get( at at javax.swing.JComponent.setUI( at javax.swing.JInternalFrame.setUI( at javax.swing.JInternalFrame.updateUI( at javax.swing.JInternalFrame.( at at at at at at at g.start(X:53) at at m.b(X:103) at l.a(X:107) at u.a(X:94) at at at at

Product: Astah Professional


Thanks for your bug report.

Please send us the following two log files to our support via email (

  1. astah_pro.log
  2. astah.log

and your .asta file if possible.



Hi again Testfree,

Thank you for the log files.

Changing the Look & Feel may resolve this issue. Go to [View] - [Look & Feel] and change it to something else. Image Text

Let me know if this works.



HI Satomi Already usable, thank you very much. However, this metal style does not seem good Mac OS X, the follow-up will support Mac OS X style it?

Hi Testfree,

First of all, glad it's working out now.

Not a specific plan on updating L&F, but will create a ticket. This might be another solution to your issue if you prefer working on Mac OS X L&F.

Go to [Tools] - [System Properties] - [Diagram Editor] and check [Hide title bar of the Diagram Editor] option. Image Text

Restart Astah and switch the L&F back to Mac OS one.

FYI, this is the diagram editor without title bar: Image Text

this is the one with title bar (it is on by default) Image Text

Let me know if this works!

Cheers, SJ

HI Satomi

thank you for your support.
Try the Mac OS X L & F based on the solution you provided, but still the same as before; so let's start with metal L & F.
Thank you again .

Hi Testfree,

Thanks for your report. Sorry that it didn't work. :( Will let you know when we have a better workaround or new version is available with a fix of this issue.

Thanks, SJ

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