load bibtex, or isi or nsf data, run Scientometrics->Extract Co-authorship Network or run Scientometrics->Extract Co-occurrence Network from Table, get the network. Select the network and right click the mouse and select View, can read the network content. But select View With..., select a file format, get an exception:
java.lang.NullPointerException?
at org.cishell.reference.gui.persistence.viewwith.FileViewWith?.execute(FileViewWith?.java:163)
at org.cishell.reference.gui.menumanager.menu.AlgorithmWrapper?.tryExecutingAlgorithm(AlgorithmWrapper?.java:163)
at org.cishell.reference.gui.menumanager.menu.AlgorithmWrapper?.execute(AlgorithmWrapper?.java:108)
at org.cishell.reference.app.service.scheduler.AlgorithmTask?.run(SchedulerServiceImpl?.java:680)
at java.lang.Thread.run(Unknown Source)
