URGENT: error during deployment of a process flow through OMB

Question

I have a process flow which uses a mapping. The mapping has already been synchronized to its corresponding process flow activity.Now i again synchronize the activity with the same mapping to which it was already synchronized
OMB+> OMBSYNCHRONIZE PROCESS_FLOW 'MAIL_TRY/RND_MAIL' ACTIVITY 'EMP_COUNT' TO MAPPING '/NEW_PROJECT2/NEW_SOURCE/EMP_COUNT' USE (SYNCHRONIZE_STRATEGY 'REPLACE
', MATCHING_STRATEGY 'MATCH_BY_NAME')
Synchronize Completed
now i create a deployment action plan and deploy the process flowand get the error as follows:
OMB+> OMBCREATE TRANSIENT DEPLOYMENT_ACTION_PLAN 'MAIL_TRY' ADD ACTION 'MAIL_TRY ' SET PROPERTIES (OPERATION) VALUES ('CREATE') SET REFERENCE PROCESS_FLOW_PACKAGE '/NEW_PROJECT2/MOD1/MAIL_TRY'
Action plan MAIL_TRY created.
OMB+> OMBCOMMIT
Commit complete.
OMB+> OMBDEPLOY DEPLOYMENT_ACTION_PLAN 'MAIL_TRY'
OMB05602: An unknown Deployment error has occured for Object Type API8028: No signature is available for mapping EMP_COUNT because the generation language is undefined. Please set the generation language property of this mapping, or generate this mapping to set the generation language property to a default value..
In order to remove that error i made the following alteration in the mapping property:
Context changed.
OMB+> OMBALTER MAPPING 'EMP_COUNT' SET PROPERTIES (GENERATION_LANGUAGE) VALUES ('PLSQL')
and then deployed the process folw only to get the following error:
OMB05602: An unknown Deployment error has occured for Object Type Trying to access invalid Object.
Element ID: 282901
Status: 4
Owning FCO: 282896
Thanks in advance!!!!!

Answer 1

A couple of things you could try are:
1 - OMBCOMPILE MAPPING 'EMP_COUNT' instead of doing the OMBALTER as this will ensure that the property is set correctly, just in case there's any problem there,
2 - "set OMBDEBUG on" before doing your OMBDEPLOY to display any additional stack traces.