[opencms-dev] Please Give the Reasone?

[Ashutosh]

Starting static export ...
Deleting static export folders ...
( 1 / 1 ) Deleted static export folder "C:\Program Files\Apache Software 
Foundation\Tomcat 6.0\webapps\opencms\temp\"
... deleting static export folders is finished.
Exporting Non-Template Resources ...
Exception org.opencms.loader.CmsLoaderException: Unknown resource type id 
40 requested.
at org.opencms.loader.CmsResourceManager.getResourceType
(CmsResourceManager.java:752)
at org.opencms.loader.CmsResourceManager.getLoader
(CmsResourceManager.java:594)
at 
org.opencms.staticexport.CmsAfterPublishStaticExportHandler.readNonTemplat
eResourcesToExport(CmsAfterPublishStaticExportHandler.java:692)
at 
org.opencms.staticexport.CmsAfterPublishStaticExportHandler.exportNonTempl
ateResources(CmsAfterPublishStaticExportHandler.java:310)
at 
org.opencms.staticexport.CmsAfterPublishStaticExportHandler.doExportAfterP
ublish(CmsAfterPublishStaticExportHandler.java:115)
at org.opencms.staticexport.CmsStaticExportManager.exportFullStaticRender
(CmsStaticExportManager.java:715)
at org.opencms.workplace.tools.database.CmsStaticExportThread.run
(CmsStaticExportThread.java:84)
Statistics:duration: 00:00:19
... the static export is finished