The above mentioned step is nothing but replacement of one the broken or corrupted files in EPMA.
If the EPMA server was patched and then re-config is going on , it does shoot the above error.
Go to <MIDDLEWARE HOME>\EPMSystem11R1\products\Foundation\BPMA\Common
There move AWBConfig.jar file to AWBConfig.jar.old (Just to take backup) copy the same file from pre-patched backup ie. from
<MIDDLEWARE HOME>EPMSystem11R1\.patch_storage\ and re try this helps.