Error at VF02-- Update terminated & same document continue to exist.

Dear SAP Experts,

I am facing a serious issue of update termination.(Component version : SAP ECC 6.0)

Whenever I am going on VF02 transaction to post already created billing document there comes a following error.

Error : “Express document “Update was terminated” received from author “ABC”.

and subsequently

&

when I put the same billing document number system shows error like -

billing document 90000463 does not exist.

Please help me and tell whether this is related to BASIS or SD ?

Thanks and regards

Anubhav

SAP SD Consultant