Impossible to reinstall missing plugins

[heiccq]

After partial deinstallation of some JOSM plugins during ubuntu upgrade, it's not possible to open the plugins tab anymore.

What steps will reproduce the problem?

1. upgrade ubuntu 10.10 from beta to rc1 (plugins were automatically removed)
2. run josm --> error message (missing plugins wmsplugin, validator)
3. open 'Einstellungen' and klick on the plugin tab --> crash

What is the expected result?
open plugin screen

What happens instead?
error message with the attached stack trace

Please provide any additional information below. Attach a screenshot if
possible.

Debian-Release: 0.0.svn3514-2
Build-Date: 2010-10-07 18:10:01
Revision: 3514
Is-Local-Build: true

Identification: JOSM/1.5 (3514 de)
Memory Usage: 102 MB / 881 MB (63 MB allocated, but free)
Java version: 1.6.0_20, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Operating system: Linux

Plugin: validator
Plugin: wmsplugin

java.lang.NullPointerException
	at org.openstreetmap.josm.plugins.PluginInformation.scanManifest(PluginInformation.java:215)
	at org.openstreetmap.josm.plugins.PluginInformation.<init>(PluginInformation.java:117)
	at org.openstreetmap.josm.plugins.PluginListParser.createInfo(PluginListParser.java:36)
	at org.openstreetmap.josm.plugins.PluginListParser.parse(PluginListParser.java:87)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.processLocalPluginInformationFile(ReadLocalPluginInformationTask.java:171)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.scanSiteCacheFiles(ReadLocalPluginInformationTask.java:90)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.scanLocalPluginRepository(ReadLocalPluginInformationTask.java:158)
	at org.openstreetmap.josm.plugins.ReadLocalPluginInformationTask.realRun(ReadLocalPluginInformationTask.java:217)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:83)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:129)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)

[heiccq]

screenshot

[bastiK]

This is probably caused by an old corrupted cache file. There are 2 ways to get it working again:

(1)

• repeat the steps you describe. When the crash comes, click cancel.
• click 'Liste herunterladen'
• it should work now

(2)

• delete the cache file in josm preference directory (plugins/site-josm.openstreetmap.de-_plugin.txt)