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Dear Matt, There may be multiple problems here so let's tackle the first one. The IDV will not run on Java 7, yet. You'll have to revert back to Java 6 for the IDV webstart version. Although I have not tried these instructions, there is an article on how to achieve this switch here http://support.apple.com/kb/ht5559. Please keep us up-to-date on your progress. Best Wishes, Unidata IDV Support > Full Name: Matt Ruglys > Email Address: address@hidden > Organization: n/a > Package Version: 4.0u1 build date:2013-03-29 18:10 UTC > Operating System: Windows XP > Hardware: Java: home: C:\Program Files\Java\jre7 version: 1.7.0_25 j3d:1.5.2 > fcs (build4) > Description of problem: Hi > > I am using IDV via webstart on Windows XP. This afternoon I updated Java > to version 7u25. Although I can still load data just fine I cannot use > my bundles and get this error message: > > Error loading bundle: \\Streproxy\users\mruglys\My > Documents\IDV\Sea_and_Swell_NZ.xidv > com.sun.org.apache.xerces.internal.dom.AttributeMap cannot be cast to > org.apache.xerces.dom.AttributeMap > > In case it is relevant I have attached the bundle I am using. > > Thanks, > > Matt > > ****************** > Stack trace: > java.lang.ClassCastException: > com.sun.org.apache.xerces.internal.dom.AttributeMap cannot be cast to > org.apache.xerces.dom.AttributeMap > at ucar.unidata.idv.ServerUrlRemapper.bundleWalker(ServerUrlRemapper.java:236) > at > ucar.unidata.idv.ServerUrlRemapper.remapUrlsInBundle(ServerUrlRemapper.java:432) > at > ucar.unidata.idv.IdvPersistenceManager.decodeXmlInner(IdvPersistenceManager.java:3039) > at > ucar.unidata.idv.IdvPersistenceManager$11.run(IdvPersistenceManager.java:2861) > at ucar.unidata.util.Misc$3.run(Misc.java:1249) > > > Ticket Details =================== Ticket ID: VMF-811319 Department: Support IDV Priority: Normal Status: Open