Diagnosis
You are processing a network activity or activity element assigned to aheader. Because cost information is stored on the network header, thesystem cannot determine any earned values for this operation.

System Response
You can continue processing.

Procedure
Use networks assigned to an operation to calculate earned values. Toenable an aggregation of the percentage of completion, choose either'work' or a 'manual weight' within the progress version as the basisfor weighting.