11.5.10.2 Maintenance pack patch 3480000 fails running WFXLoad.class with error : Exception in thre

Hi,
Applying patch 3480000 we are facing issues on workers:

ATTENTION: All workers either have failed or are waiting:

           FAILED: file WFXLoad.class on worker  1.
           FAILED: file WFXLoad.class on worker  2.
           FAILED: file WFXLoad.class on worker  3.
           FAILED: file WFXLoad.class on worker  4.
           FAILED: file WFXLoad.class on worker  5.
           FAILED: file WFXLoad.class on worker  6.

Error on adwork00*.log

Exception in thread "main" java.lang.NoClassDefFoundError: oracle/apps/fnd/metadata/DatabaseClass
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
        at java.security.SecureClassLoader.defineClass(SecureClassLoad


the adwork*.log are showing :

File name : adwork001.log
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