Exception while exporting .cdx file to EMF drawing

Hello!

I programmatically read a molecule from .cdx file and then try to export it to EMF drawing. During this conversion an exception occurs:

 java.util.NoSuchElementException
	at java.util.TreeMap.key(TreeMap.java:1206)
	at java.util.TreeMap.firstKey(TreeMap.java:267)
	at java.util.TreeSet.first(TreeSet.java:377)
	at org.freehep.graphicsio.ImageGraphics2D.getPreferredImageWriter(ImageGraphics2D.java:453)
	at org.freehep.graphicsio.ImageGraphics2D.writeImage(ImageGraphics2D.java:405)
	at org.freehep.graphicsio.emf.gdi.AlphaBlend.write(AlphaBlend.java:139)
	at org.freehep.graphicsio.emf.EMFTag.write(EMFTag.java:45)
	at org.freehep.util.io.TaggedOutputStream.writeTag(TaggedOutputStream.java:89)
	at org.freehep.graphicsio.emf.EMFOutputStream.writeTag(EMFOutputStream.java:242)
	at org.freehep.graphicsio.emf.EMFGraphics2D.writeImage(EMFGraphics2D.java:424)
	at org.freehep.graphicsio.AbstractVectorGraphicsIO.drawImage(AbstractVectorGraphicsIO.java:482)
	at org.freehep.graphicsio.AbstractVectorGraphicsIO.drawImage(AbstractVectorGraphicsIO.java:379)
	at chemaxon.marvin.paint.internal.MolPainter.paintAtom(Unknown Source)
	at chemaxon.marvin.paint.internal.MolPainter.paintObjects(Unknown Source)
	at chemaxon.marvin.paint.internal.MolPainter.paintDocument(Unknown Source)
	at chemaxon.marvin.paint.internal.MolPainter.paintDocument(Unknown Source)
	at chemaxon.marvin.io.formats.image.ImageExport.paint(Unknown Source)
	at chemaxon.marvin.io.formats.vectgraphics.VectGraphicsExport.convert(Unknown Source)
	at chemaxon.struc.Molecule.exportToObject(Unknown Source)
	at chemaxon.struc.Molecule.exportToObject(Unknown Source)
	at chemaxon.struc.Molecule.exportToBinFormat(Unknown Source)
	at chemaxon.struc.Molecule.toBinFormat(Unknown Source)

I tried to export a molecule to EMF picture with MolExporter and Molecule.toBinFormat() with no difference. Export string is "emf:scale30". Sample files are included in the archive.

Is this a bug or a misuse of MarvinSketch API?

Thank you!

Which Marvin version you have?

I'm using MarvinSketch version 5.3.8.

I have tested your cdx files with the attached example by using Marvin Beans 5.3.8. But I did not met any error message on the console. The EMF file is created properly.

The most relevant part of my code is copied here:

The issue is closed. It occurres because I don't use MarvinSketch as a bunch of separate jars (as it comes), but rather repack almost all jars into single jar file. During this operation I erroneously skipped the content of META-INF/services/ folders of FreeHEP jars, and it led to an exception.

I am glad that the problem was solved. Thanks for the feedback.

Tamas, thank you for your help!