How to set a Mtype can do reservation ?

Question

Hi ,
     When i do MB21 , i wanna choose mtype 551 . The system returns an error :
Reservation for 551 is not possible. (Choose another movement type)
Message no. M7500
Diagnosis
Goods movements with movement type 551 cannot be planned via reservations.
Procedure
Enter a different movement type or enter the goods movement without a reservation.
So how to configure the system to enable it ? Thanks.
BR,
Wayne

Answer 1

Hi Wayne,
In the standard it is only possible to create reservations for those movement types which have a value in the field 'Reserv.cat' (T156-RSTYP).
As you can see in the customizing transaction OMJJ, this field is located under the section for 'Internal control' (please do not change).
The F1-on-line-help for this field states:
"Account assignment of reservation:
Indicates the account assignment category of a reservation created with this movement type .
Use:
If the indicator has not been set, the movement type cannot be used to generate a reservation."
Therefore, in the standard, it is not possible to create a reservation for these movement types.
About the possibility of creating your own movement type which allows this possibility, please, notice that the field T156-RSTYP is not configurable. Changing it could cause other unknown problems. You might consider creating a new movement type by copying from an existing movement type which has this indicator set.
Which reference to choose depends on your business requirement.
Also consider that, from the business point of view, as Arif has already said, this does not make too much sense since the scrap movement types are, by definition, not planned.
A goods issue with a scrap movement is always a non-planned goods movement. No reference document can exist for it.
I hope this helps!
Esther.