Error using remote invoke

I’ve got an IS 4.6 that makes a remote invoke on a IS 6.1
Today I found several lines like the ones below.

00000E [B2BCORE.0076.0002] BinCoder decode error creating IDataCodable com.wm.app.prt.event.TransitionMetaData, using BasicDataCodable instead. Excpt:java.lang.ClassNotFoundException: com.wm.app.prt.event.TransitionMetaData.class not found

00000F [B2BCORE.0076.0001] BinCoder decode error creating IData com.wm.data.ISMemDataImpl, using BasicData instead. Excpt:java.lang.ClassNotFoundException: com.wm.data.ISMemDataImpl.class not found

Any info about this would be appreciated
/Hakan

there is a IS 6.1 SP1 fix#6 available for this issue, try it or open a service request with wM.

http://advantage.webmethods.com/cgi-bin/advantage/main.jsp?w=0&targChanId=knowledgebase&oid=1612328384