Schedule Agreement filed- lphis

Question

Hi
In the customizing for the document type for the scheduling agreement there is check box for Release documentation, which says that if it is activated then forecast schedule will be saved in a seperate file and displayed anytime.
This tick was activated in our client which prevented the goods receipt and system says 'no selectable item found'. When i removed the tick, the system allowed the goods receipt.We are using only standard schedule agreement with out forecast and jit schedules.
Could anybody inform me the significance of the field LPHIS. Does the activation of release documentation requires schedule agreement schedule lines to be printed before goods can be receipted. 
Regards
Arvind

Answer 1

Hello,
there are two kind of SA,  SA with and without release documentation.  if the field LPHIS is set  so you have SA with release documentation.
Now, if you are managing SA using SA with release documentation you have to perform the Scheduling agreement release process, otherwise all schedule lines remain  non official.
hereafter a descritpion of the Release process "source : the standard SAP document page 221
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/MMPUR/MMPUR.pdf"
Scheduling Agreement Releases: Process
Purpose
A scheduling agreement release
enables you to record the current status of the lines of a delivery schedule stored in the system
for a scheduling agreement item and then transmit this status to the vendor.
Process Flow
1. Materials Planning generates delivery schedule lines for scheduling agreement items. You
can also create schedule lines manually.
2. You create scheduling agreement (SA) releases (delivery schedules) comprising the
schedule lines for a certain scheduling agreement item. These are snapshots of the overall
delivery schedule stored in the system at given points in time.
In creating such releases, the system proceeds as follows:
a. If a creation profile exists, it aggregates the release (i.e. scheduled) dates and quantities.
b. It generates an SA release in accordance with the creation strategy and the entries on
the initial screen for SA release creation.
c. If a creation profile exists, it determines any backlogs and immediate requirements.
d. If a creation profile exists, it checks any applicable tolerances in the case of SA releases
created due to changes to the overall schedule in the system.
3. The releases (delivery schedules) are transmitted as messages to the vendor.
regards