The creation of the export DataSource failed. Function RSA1_OLTPSOURCE_GET_ALL not fou nd

Hello Experts,

I have seen few SCN posts regarding same issue but I didn't get solution.

I also read SAP Note 597326 but again no luck.

My scenario is : DataSource > DSO > InfoCube > Bex Query
I have modified DSO/Infocube (which is already transported to quality) with some new characteristics & also I have removed few characteristics.

While transporting, the infocube & BexQuery is getting transported without any error but DSO gives below error while transporting.

We are getting same error when we create new DSO (Not present in QA) in Dev & try to transport it to quality.

Pls help!