Date comes after end of valid factory calendar

    When you use transaction code MD04 to check the stock/requirement list ,you got this SAP error message:

e.g : 2015/1/4 date comes after end of valid factory calendar .

Correct:

1. Extend the factory calendar . (TC: SCAL)
2. Change the plan horizon ,ensure the horizon days is less than the days between current date and the end of valid factory calendar.(I have no reason,I think SAP use different logic to process the demand out and in of a horizon )
3. Change the Lot-size of thematerial ,almost is cause by a WB or similar lot-size types . I think cause a WEEK lot-size will cross a month or 1 year ,for example the first week of 2015 include 2014's last 3 days and  Jan 1st and Jan 4th of 2015 . So if you change the lot-size to day or month Lot-size this issue will be solved ,cause they never cross a month or a year .(MM02)