dspace-oai tries to call the xoai library, but the xoai library doesn't provide the method signature dspace-oai expects.
Most likely you forgot to run "mvn clean" during installation/upgrade and have 2 xoai jars. Look for xoai jars in [dspace]/lib/. DSpace 5.1 expects to find xoai-3.2.9.jar. If you have multiple xoai versions there, it's unpredictable which one will be used and you should rebuild dspace using "mvn clean package ..." (or delete the wrong xoai version from _all_ dspace webapps, there will be multiple copies). Regards, ~~helix84 Compulsory reading: DSpace Mailing List Etiquette https://wiki.duraspace.org/display/DSPACE/Mailing+List+Etiquette -- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/dspace-tech. For more options, visit https://groups.google.com/d/optout.
