Bodo,

thanks for your mail. It would be great if you could provide us with the data you're working with (which you can directly send to me), or build a small, self-contained example.

Christian Am 18.06.2012 08:25 schrieb "Bodo Hüsemann" bodo.huesemann@gmx.de:

Hi,

the following xquery (BaseX721, Java, embedded server):

   for $guildchar in

collection('default')/apiresponse/guild[@name="Guild"]/characters/character return for $detailchar in collection('default')/apiresponse/character where $detailchar/@name=$guildchar/@name return $detailchar

produces the exception: java.io.IOException: Das Handle ist ungültig java.io.RandomAccessFile.seek(Native Method) org.basex.io.random.TableDiskAccess.readBlock(TableDiskAccess.java:519) org.basex.io.random.TableDiskAccess.readIndex(TableDiskAccess.java:502) org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:481) org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:189) org.basex.data.Data.kind(Data.java:293) org.basex.query.item.DBNode$4.next(DBNode.java:350) org.basex.query.path.IterStep$1.next(IterStep.java:44) org.basex.query.iter.NodeIter.next(NodeIter.java:1) org.basex.query.path.IterPath$1.next(IterPath.java:64) org.basex.query.iter.NodeIter.next(NodeIter.java:1) org.basex.query.flwor.For$1.next(For.java:85) org.basex.query.flwor.FLWR$1.next(FLWR.java:63) org.basex.query.expr.Constr.add(Constr.java:63) org.basex.query.expr.CElem.item(CElem.java:82) org.basex.query.expr.CElem.item(CElem.java:1) org.basex.query.expr.CFrag.item(CFrag.java:1) org.basex.query.expr.ParseExpr.value(ParseExpr.java:66) org.basex.query.QueryContext.value(QueryContext.java:286) org.basex.query.func.UserFunc.value(UserFunc.java:153) org.basex.query.QueryContext.value(QueryContext.java:286) org.basex.query.func.TailFuncCall.value(TailFuncCall.java:46) org.basex.query.QueryContext.value(QueryContext.java:286) org.basex.query.func.UserFunc.value(UserFunc.java:153) org.basex.query.QueryContext.value(QueryContext.java:286) org.basex.query.func.BaseFuncCall.value(BaseFuncCall.java:55) org.basex.query.func.BaseFuncCall.iter(BaseFuncCall.java:68) org.basex.query.QueryContext.iter(QueryContext.java:275) org.basex.query.QueryContext.iter(QueryContext.java:229) org.basex.query.QueryProcessor.iter(QueryProcessor.java:74) org.basex.server.QueryListener.execute(QueryListener.java:122) org.basex.server.ClientListener.query(ClientListener.java:463) org.basex.server.ClientListener.run(ClientListener.java:148)

The Query is doing ok in the BaseX Gui but fails in my Application (other queries are running like a charm).

Reformulations or similar variants of the query fail the same way. Do you have a hint what could be wrong here? What should I try next?

Thanks a lot for this great xml db!

Best regards, Bodo

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