inbound ----idoc error

Hi,

DELINS--DELFOR01 (msg and basic)

The idoc contains below dates...

-->in E1EDK09

BSTDK 20070803 Customer purchase order date

ABNRD 20070727 Delivery Schedule Date

-->in E1EDP10

LIDTL 20070730 Date of last delivery posted by the customer

ABDAT 00000000 Reconciliation date for agreed cumulative quantity

ABFDE 20070914 End of production go-ahead

ABMDE 20070914 End of material go-ahead

ABRBI 20080531 SA rel. valid to

SCREL 03 Release schedule

BSTDK 20070803 Customer purchase order date

ABNRD 20070727 Delivery Schedule Date

--> in E1EDP16

EDATUV 20070822 Schedule line date from

EDATUB 20070822 Schedule line date until

During inbound idoc process idoc gets status 51 with below error..

Realistic release date: 03.08.2007

pls let me know the problem?