Error in scheduling the BODS job in BW

Hi,

  I have an issue while scheduling the SAP BODS Job from SAP BW, it is showing error as "Exception occur while modifying the repository object at repository <Repo>.

the same job is successfully executed from SAP BODS Designer and the data is loaded into BW datasource. but while scheduling it is showing error.

can any one help me on this error

Thanks

PrasannaKumar