Hi,
services in WmRoot and WmPublic are available precompiled in some internal jar files and do not have the java source explicitly available for recompile.
First of all stop and restart the affected instance as Senthil has suggested. Check the wrapper.log and server.log for any loading error messages.
If this does not help you can try to reinstall your IntegrationServer.
Finally, you should open a SupportTicket with SAG to get this analyzed.
Regards,
Holger
#Integration-Server-and-ESB#webMethods