Not sure whose problem this is, but the built in ODD to RELAXNC processor (part of the oXygen TEI framework) at release 25 of oxygen editor still seems to be using a component that needs updating.

[xslt] Loading stylesheet /home/lou/Oxygen XML Editor 25/frameworks/tei/xml/tei/stylesheet/profiles/default/relaxng/to.xsl

[echo] TRANG generate RNC from RELAXNG files

WARNING: A terminally deprecated method in java.lang.System has been called

WARNING: System::setSecurityManager has been called by org.apache.tools.ant.types.Permissions (file:/home/lou/Oxygen%20XML%20Editor%2025/tools/ant/lib/ant.jar)

WARNING: Please consider reporting this to the maintainers of org.apache.tools.ant.types.Permissions

WARNING: System::setSecurityManager will be removed in a future release

[delete] Deleting: /home/lou/Public/odd4crit/out/odd4crit.rnc.rng

"terminally deprecated" sounds a lot worse than it probably is...