StackOverflowError when calling toFile

[wy672515431]

I am using version 0.18.1 and I get a StackOverflowError when trying to output to a file. Here's a minimal example to reproduce the problem:
MutableGraph graph = mutGraph("example1").setDirected(true).add( mutNode("a").add(Color.RED).addLink(mutNode("b"))); Graphviz.fromGraph(graph).height(100).render(Format.PNG).toFile(file);

Error message is below.

at guru.nidi.graphviz.engine.Graphviz.useDefaultEngines(Graphviz.java:112) at guru.nidi.graphviz.engine.Graphviz.useEngine(Graphviz.java:124) at guru.nidi.graphviz.engine.Graphviz.useDefaultEngines(Graphviz.java:112) at guru.nidi.graphviz.engine.Graphviz.useEngine(Graphviz.java:124) at guru.nidi.graphviz.engine.Graphviz.useDefaultEngines(Graphviz.java:112) at guru.nidi.graphviz.engine.Graphviz.useEngine(Graphviz.java:124) at guru.nidi.graphviz.engine.Graphviz.useDefaultEngines(Graphviz.java:112) at guru.nidi.graphviz.engine.Graphviz.useEngine(Graphviz.java:124) at guru.nidi.graphviz.engine.Graphviz.useDefaultEngines(Graphviz.java:112) at guru.nidi.graphviz.engine.Graphviz.useEngine(Graphviz.java:124)

[wy672515431]

when I add Graphviz.useDefaultEngines(); , the error become guru.nidi.graphviz.engine.GraphvizException: None of the provided engines could be initialized.