Production Order settlement issue

During production order settlement I have got an error

Error: Complete PA transfer structure A1

I have checked all the point given in diagnosis below & also searched this forum as well but not getting solution for my problem

Diagnosis

o There is no value field assignment for cost element 300800 /

variance category REMV in PA transfer structure A1, or

o PA transfer structure A1 has no assignments, or

o No "Origin" is maintained for the assignments in PA transfer

structure A1 (cost element group and, if applicable, variance

category)

Source & Value fields are defined for all assignment lines. What should I do next?