Using JDK8 (OSX)
java -jar plantuml.jar -ttxt -v diagram.txt
(0.000 - 0.000 - 0.000(0) - 123 Mo) 120 Mo - PlantUML Version 8009
(0.070 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - GraphicsEnvironment.isHeadless() false
(0.075 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Setting current dir: .
(0.075 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Setting current dir: ...
(0.076 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Using default charset
(0.079 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Setting current dir: ...
(0.085 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Setting current dir: ...
(0.085 - 0.000 - 0.000(0) - 123 Mo) 119 Mo - Reading file: diagram.txt
(0.268 - 0.000 - 0.000(0) - 123 Mo) 104 Mo - Creating file: ...
(0.276 - 0.000 - 0.000(0) - 123 Mo) 104 Mo - Number of image(s): 1
cat diagram.atxt
java.lang.IllegalArgumentException
at net.sourceforge.plantuml.posimo.Path.<init>(Unknown Source)
at net.sourceforge.plantuml.cucadiagram.dot.CucaDiagramTxtMaker.<init>(Unknown Source)
at net.sourceforge.plantuml.cucadiagram.CucaDiagram.createFilesTxt(Unknown Source)
at net.sourceforge.plantuml.cucadiagram.CucaDiagram.exportDiagramInternal(Unknown Source)
at net.sourceforge.plantuml.UmlDiagram.exportDiagram(Unknown Source)
at net.sourceforge.plantuml.PSystemUtils.exportDiagramsCuca(Unknown Source)
at net.sourceforge.plantuml.PSystemUtils.exportDiagrams(Unknown Source)
at net.sourceforge.plantuml.SourceFileReader.getGeneratedImages(Unknown Source)
at net.sourceforge.plantuml.Run.manageFileInternal(Unknown Source)
at net.sourceforge.plantuml.Run.processArgs(Unknown Source)
at net.sourceforge.plantuml.Run.manageAllFiles(Unknown Source)
at net.sourceforge.plantuml.Run.main(Unknown Source)