Issue with an IDOC delvry07

Hi,

I am using the following segments to create Outbound delivery and PGI with reference to STO for the IDOC delvry07.

E1EDL20

     E1EDL21
     E1EDL18
     E1EDL18
     E1ADRM1
     E1EDT13
     E1EDT13
E1EDL24

    E1EDL41

Getting error message "Essential transfer parameters are missing in record:

even though the following parameters are maintained in the field

Shipping point

Sales organization

Distribution channel

Division

Material number

Delivery quantity

Regards,

AK G