Ajay
When the order operation end constraint contains the value '5' (Finish from confirmation) the message CN 718 is raised. The text of this message is 'You cannot maintain key x for the constraint'.
The number displayed in the message relates to the start constraint type and not the end constraint type. This is incorrect.
If a constraint type 5 'Start of Resource Planning' is maintained,after the order is saved the start constraint and the date fields are blank.
If such a constraint is maintained in the order operation, when the order is next processed in a transaction, the constraint and its associated dates are moved to the dispatched start date and time fields and the constraint fields are deleted.
There is also no documentation about the start constraint type 5.
Transaction : IW32 Program : SAPLCOIH Screen : 3121
afvgd-einsa afvgd-einse
afvgd-epanf afvgd-ntanf
afvgd-epanz afvgd-ntanz
Take the ABAP team in exercise to implement Support Package 6633 will help out.
good luck