saving / uploading problems with downloaded .osm-files

[Serpens]

[answer in german or english]

If I download files from informationfreeway.org (e.g. ​http://informationfreeway.org/api/0.6/*[amenity=embassy] ) I can open them in JOSM. But then I can't save them again (exception thrown) and sometimes I cannot upload changes ("version needed"). Maybe those api-generated files are corrupted, I don't know.

Path: trunk
URL: http://josm.openstreetmap.de/svn/trunk
Repository Root: http://josm.openstreetmap.de/svn
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 1566
Node Kind: directory
Last Changed Author: stoecker
Last Changed Rev: 1566
Last Changed Date: 2009-04-30 15:59:56 +0200 (Thu, 30 Apr 2009)

Java version: 1.6.0_13
Plugins: lakewalker;validator;wmsplugin
Plugin lakewalker Version: 14015
Plugin validator Version: 14123
Plugin wmsplugin Version: 14120

java.lang.NullPointerException

at org.openstreetmap.josm.io.XmlWriter.encode(XmlWriter.java:26)
at org.openstreetmap.josm.io.OsmWriter.visit(OsmWriter.java:129)
at org.openstreetmap.josm.io.OsmWriter.writeContent(OsmWriter.java:77)
at org.openstreetmap.josm.actions.SaveActionBase.save(SaveActionBase.java:165)
at org.openstreetmap.josm.actions.SaveActionBase.save(SaveActionBase.java:145)
at org.openstreetmap.josm.actions.SaveActionBase.doSave(SaveActionBase.java:57)
at org.openstreetmap.josm.actions.SaveActionBase.actionPerformed(SaveActionBase.java:38)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.KeyboardManager.fireBinding(Unknown Source)
at javax.swing.KeyboardManager.fireKeyboardAction(Unknown Source)
at javax.swing.JComponent.processKeyBindingsForAllComponents(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[stoecker]

Closed as duplicate of #2545.