<diagnostics>
    <diagnostic xmlns="http://www.loc.gov/zing/srw/diagnostic/">
        <details>
            <url>http://sru2.visual-library.de/sbt?operation=searchRetrieve&amp;query=bib.personalName%3D%28Goethe%2C+Johann%29+and+dc.title%3DWerther+sortBy+dc.date%2Fasc&amp;startRecord=1&amp;maximumRecords=10&amp;recordSchema=mods</url>
            <headers><header name="ACCEPT" value="text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"/><header name="ACCEPT-ENCODING" value="zstd, br, gzip"/><header name="ACCEPT-LANGUAGE" value="en-US,en;q=0.5"/><header name="CONNECTION" value="Keep-Alive"/><header name="HOST" value="sru2.visual-library.de"/><header name="Remote-Addr" value="192.168.1.13"/><header name="USER-AGENT" value="CCBot/2.0 (https://commoncrawl.org/faq/)"/><header name="X-FORWARDED-FOR" value="18.97.14.84"/><header name="X-FORWARDED-HOST" value="sru2.visual-library.de"/><header name="X-FORWARDED-SERVER" value="sru2.visual-library.de"/></headers>
            <params><param name="maximumRecords" value="10"/><param name="operation" value="searchRetrieve"/><param name="query" value="bib.personalName=(Goethe, Johann) and dc.title=Werther sortBy dc.date/asc"/><param name="recordSchema" value="mods"/><param name="startRecord" value="1"/></params>
            <traceback>Traceback (most recent call last):
  File "/vls/instance/server/dynamic/vlz/engine2.py", line 272, in searchRetrieve
    return self._searchRetrieve(*args, **kwargs)
  File "/vls/instance/server/dynamic/vlz/engine2.py", line 407, in _searchRetrieve
    fetchResult = protocolHandler.fetchRecords(**fetchKwars)
  File "/vls/instance/server/dynamic/vlz/fetchers.py", line 195, in fetchRecords
    numrecs, records = self._fetchRecords(startRecord=startRecord, maxRecords=maxRecords)
  File "/vls/instance/server/dynamic/vlz/fetchers.py", line 567, in _fetchRecords
    records = self._sortResponse(records)
  File "/vls/instance/server/dynamic/vlz/fetchers.py", line 590, in _sortResponse
    records = records.sort(keys)
  File "/vls/libpy/PyZ3950/zoom.py", line 700, in sort
    return self._conn.sort([self], keys)
  File "/vls/libpy/PyZ3950/zoom.py", line 414, in sort
    self.err(diag.condition, diag.addinfo, diag.diagnosticSetId)
  File "/vls/libpy/PyZ3950/zoom.py", line 145, in err
    raise Bib1Err (self.errCode, self.errMsg, self.addtlInfo)
Bib1Err: Bib1Err: 207 Cannot sort according to sequence ('v2Addinfo', '')
</traceback>
            <additional><name>Bib1Err</name></additional>
            <exception><class class="Bib1Err" module="PyZ3950.zoom"/><message>Bib1Err: Bib1Err: 207 Cannot sort according to sequence ('v2Addinfo', '')
</message><args/></exception>
        </details>
        <message>An error has occured: Bib1Err - Cannot sort according to sequence</message>
    </diagnostic>
</diagnostics>