MB21 SAP TCode - Create Reservation









Module Pool for Reservations SAP screen

What is MB21 (Create Reservation) and how is it used? Within an SAP system there are numerous transaction codes (TCode) that each serve different purposes and provide easy access to a variety of different functionality. One such TCode is MB21, which provides access to Create Reservation / Module Pool for Reservations SAP screen functionality within R/3 SAP (Or S/4HANA) systems, depending on your version and release level.

Below for your convenience is a few details about this tcode including any standard documentation. In-order to use this transaction within your SAP system simply enter it into the command input box located in the top left hand corner of the SAP GUI, and press enter. You can also add additional command options such /o to trigger in new window..See full list of command options available.

execute MB21 tcode

Program Name: SAPMM07R
Screen Number: 0500

MB21 Authorisation objects

In-order to be able to use a SAP transaction code you need to have the correct authorisations setup for your user ID. To check if you have the required level of authorisation to run this use tcode SU53 via a new session (i.e. /N). Simply execute MB21 and then execute /NSU53 immediately afterwards. A report of all authorisations checked will then be displayed...See check tcode authorisation for full details and screenshots of how to check what authorisations you are missing to use a tcode.

Object Field Value
M_MRES_WWA ACTVT 01
M_MRES_WWA WERKS



SAP GUI Support for tcode MB21

When a tcode is created you can select which SAP GUI it has support for from HTML, Java and the main Windows GUI you are probably most familiar with.
GUI for HTML is selected
GUI for Java is selected
GUI for Windows is selected

SAPGUI for HTML
MB21 includes support for the HTML web based GUI. The SAP GUI for HTML generates HTML pages for each screen of the SAP transaction so that it can be executed within a standard web browser. Please note there are technical restrictions and possible incompatibility issues with certain browsers which means some transaction functionality may not function correctly.

SAPGUI for Java
MB21 includes support for the Java based GUI. The SAP GUI for Java support provides more controls than the SAP GUI for HTML, but requires a plug-in to be downloaded and installed on the users PC so is less popular than the SAP GUI for HTML.

SAPGUI for windows
MB21 includes support for the Windows based GUI. Windows(WinGUI) support is the most popular option and transactions can be run under SAP GUI for Windows.



SAP Program associated with transaction MB21

For further details and documentation see program SAPMM07R

MB21 SPRO IMG Menu Path

Logistics->Production->KANBAN->Environment->Inventory Management->Reservation->Create(MB21)

Logistics->Production->DRP->Execution->Reservation->Create(MB21)

Logistics->Logistics Execution->JIT Inbound->Environment->Inventory Management->Reservation->Create(MB21)

Logistics->Logistics Execution->JIT Outbound->Environment->Inventory Management->Reservation->Create(MB21)

Logistics->Sales and Distribution->Foreign Trade/Customs->General Foreign Trade Processing->Environment->Purchase - Import->Inventory Management->Reservation->Create(MB21)

Logistics->Materials Management->Foreign Trade/Customs->General Foreign Trade Processing->Environment->Purchase - Import->Inventory Management->Reservation->Create(MB21)

Logistics->Materials Management->Returnable packaging logistics->Environment->General Inventory Management->Reservation->Create(MB21)

Logistics->Materials Management->Inventory Management->Reservation->Create(MB21)



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