Error occurs while the user creates an vendor(MDM)

Hi,

The following error occurs when the user creates an vendor(MDM) and submits the form for validation on Enterprise portal.

" Could not create JCOClientConnection for logical System: MDM_WD_MODELDATA_DEST - Model: class com.xxxx.ven.crt.MDMBAPIValidateModel. Please assure that you have configured the RFC connections and/or logical system name properly for this model"

Can any one help me out how to rectify this error?

Regards,

KN