I see this problem has been reported several times over the past few years. Under OS X Yosemite, using DeID v1.2, I get reported below error.
Could you please fix this issue?

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Width (0) and height (0) cannot be <= 0
at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1016)
at java.awt.image.BufferedImage.(BufferedImage.java:351)
at com.apple.laf.AquaImageFactory.getAppIconImageCompositedOn(AquaImageFactory.java:131)
at com.apple.laf.AquaImageFactory.lambda$getAppIconCompositedOn$0(AquaImageFactory.java:111)
at sun.awt.image.MultiResolutionCachedImage.lambda$map$1(MultiResolutionCachedImage.java:83)
at sun.awt.image.MultiResolutionCachedImage.getResolutionVariant(MultiResolutionCachedImage.java:66)
at sun.java2d.SunGraphics2D.getResolutionVariant(SunGraphics2D.java:3198)
at sun.java2d.SunGraphics2D.drawHiDPIImage(SunGraphics2D.java:3111)
at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3313)
at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296)
at javax.swing.ImageIcon.paintIcon(ImageIcon.java:425)
at javax.swing.plaf.IconUIResource.paintIcon(IconUIResource.java:72)
at dit.ErrorFrame$ErrorCellRenderer.scaleIcon(ErrorFrame.java:91)
at dit.ErrorFrame$ErrorCellRenderer.(ErrorFrame.java:62)
at dit.ErrorFrame.(ErrorFrame.java:152)
at dit.DEIDGUI.(DEIDGUI.java:67)
at dit.DEIDGUI$8.run(DEIDGUI.java:685)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

We have determined that the related display error was due to a warning icon that was too small to display with Mac Retina.  The warning was changed to a text display and should no longer affect performance of the software with OS X Yosemite.  Version 1.2.1 is now available and incorporates this change.
Thanks,
Mark

Updating your OS may resolve the problem. We are not able to replicate your error using the most recent version of OS X Yosemite. Thanks.