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Custom Extension Receives java.lang.Exception: java.lang.UnsupportedClassVersionError (Doc ID 981703.1)

Last updated on MAY 31, 2023

Applies to:

Oracle Communications MetaSolv Solution - Version 6.0.15 to 6.2.0 [Release 6.0.15 to 6.2.0]
Information in this document applies to any platform. *** ***


Receiving the following error when executing custom extension code:

java.lang.Exception: java.lang.UnsupportedClassVersionError: com/metasolv/custom/common/extension/ExtensionFactory (Unsupported major.minor version 49.0)

at com.mslv.webapp.pblistener.PBListener.invokeClass(

at com.mslv.webapp.pblistener.PBListener.doPost(

at javax.servlet.http.HttpServlet.service(

at javax.servlet.http.HttpServlet.service(


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