Detail diffierence between MD01 and MD02

Question

Dear all
Detail diffierence between MD01 and MD02
one material under Plant 1000, material master all ready
currently  we have one planed order against this materaial as following:
25.12.2009     PlOrd.     0242458238/Stck          0050          7.400,000      3.000,000-     4491     23.12.2009     23.12.2009
run MD01
Parameter setting in MD01
Scope of planning
Plant                     1000    **********
Processing key              NETCH   Net change for total horizon
Create purchase req.      2       Purchase requisitions in opening period
Schedule lines               3       Schedule lines
Create MRP list             1       MRP list
Planning mode              3       Delete and recreate planning data
Scheduling                    2       Lead time scheduling and capacity planni
Planning date                23.12.2009
after run MD01, I guess the planned order number should be changed since I setting Planning mode as "3", also scheduling of planned order should be carried out, but the planned order number and scheduling are not changed.
but, I run MD02 by single material,  the parameter setting as MD01 screen.
This time, planned order number changed as well as scheduling of new planned order is carried out.
so I confused what the exactly diffierence btw MD01 and MD02
Thanks for your suggestion
Benny

Answer 1

Benny,
MD01 requires a planning file entry, MD02 does not.
Check/create appropriate Planning file entries in MD20.
To create planning file entries for all materials in background, use MDAB. Depending on the history of your system, you might also have to fix inconsistancies using MDRE.
Planning Process
http://help.sap.com/saphelp_erp60_sp/helpdata/EN/5c/33b8371a2c9912e10000009b38f889/frameset.htm
Setting up a planning file
http://help.sap.com/saphelp_erp60_sp/helpdata/EN/f4/7d279044af11d182b40000e829fbfe/frameset.htm
Rgds,
DB49