error while recieve subcontracting item through order details


I am using navision 4.0 sp3 ,i created sub con worksheet based on production order and created sub con order
In sub con order through order sub con details i am sending and receiving
while receiving i am getting this error.

The Purchase Line does not exist.

Identification fields and values:

Document Type=‘Order’,Document No.=‘nnnn…’,Line No.=‘0’

Thanks in advance

Activate debugger and check…