Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via GitHub by don-vip
, 1 year ago
This exception has no message.
java.lang.NullPointerException at org.matsim.contrib.josm.actions.NetworkTest.visit( at at at org.matsim.contrib.josm.actions.NetworkExporter.exportData( at org.openstreetmap.josm.actions.SaveActionBase.doInternalSave( at org.openstreetmap.josm.actions.SaveActionBase.doSave( at org.openstreetmap.josm.actions.SaveActionBase.doSave( at org.openstreetmap.josm.actions.SaveActionBase.actionPerformed(