ORA-20001: Oracle error -2074: ORA-02074: cannot SET NLS in a distributed transaction

 Problem:

 Bpel via dbadapter calls a  API using XA Datasource.
 The DB Adapter fails with the following exception:

 ORA-20001: Oracle error -2074: ORA-02074: cannot SET NLS in a distributed transaction has been detected in fnd_global.set_nls.set_parameter('NLS_LANGUAGE','AMERICAN'). has been detected in  fnd_global.set_nls. 
 ORA-06512: at "APPS.XXSON_PLYS_AGILE_TO_EBS", line 162 ORA-06512: at line 1 
 Check to ensure that the API is defined in the database and that the parameters match the signature of the API. 
 This exception is considered not retriable, likely due to a modelling mistake. 
 To classify it as retriable instead add property nonRetriableErrorCodes with value "-20001" to your 
 deployment descriptor (i.e. weblogic-ra.xml). To auto retry a retriable fault set these composite.xml properties for 
 this invoke: jca.retry.interval, jca.retry.count, and jca.retry.backoff. All properties are integers. ". 
 The invoked JCA adapter raised a resource exception. 
 Please examine the above error message carefully to determine a resolution.

 Solution:

 1) Change the Datasource to NON XA.
 2) If for some reason you are not in  a position to change it to Non XA, then look for the below code in the API causing this issue and comment it.
    FND_GLOBAL.APPS_INITIALIZE(xxxx,yyyy,zzz);