Exception in thread "main" java.lang.NullPointerException
at org.ofdrw.font.EnvFont.strBounds(EnvFont.java:83)
at org.ofdrw.layout.element.TxtGlyph.getW(TxtGlyph.java:49)
at org.ofdrw.layout.element.Span.blockSize(Span.java:293)
at org.ofdrw.layout.element.Paragraph.doPrepare(Paragraph.java:487)
at org.ofdrw.layout.engine.Segment.tryAdd(Segment.java:86)
at org.ofdrw.layout.engine.SegmentationEngine.process(SegmentationEngine.java:51)
at org.ofdrw.layout.OFDDoc.close(OFDDoc.java:596)
at com.example.ofdrelation.ofdrw.HelloWorld.main(HelloWorld.java:24)