collective billing wrt billing plan

Hi Expert,

we have one scenario in which we make a single sales order for particular item . for which we have a billing plan as our MIS requirement we need to have billing plan so that we get a revenue for each month, how much we have collection from this customer , but our customer required only single invoice . so when i tried to make it by collective invoice it gives error that splitting happened due to different header data.

our requirement is whether billing plan have different dates for particular order . but we should make it into single invoice..

Please tell us what kind of changes we can make into copy control so that we can make it into single invoice.

With Regards.

MILIND