ECO creation fails through ISG webservice

Hi All, 

We are using Integrated SOA Gateway webservice to create ECO.

Request gets invoked successfully From the log file, it appears api failed at 'ENG_MUST_BE_IN_SAME_ECO'.

This error should not appear as we are populating only p_eco_rec with required parameters.

Did some metalink search and found note 1573240.1. The note states following:

'Due to technical challenges, ISG cannot identify empty tags or tags that are not there in the request as NULL.'

Can someone please confirm if issue reported in above note is valid in case of ECO creation as well.

(Assume this to be the issue since api eng_eco_pub.procss_eco, checks if any of the table types are populated, when it performs validation for same ECO)