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Base unit of Measure

Former Member
0 Kudos

Hi Experts

We have created new material with B UOM as Kg

PR PO Migo has been passed on same

Now we Dev department says that they nedd to chane B UOM

But how to about this as if we tried system gives error message

Pls help


Accepted Solutions (1)

Accepted Solutions (1)

Former Member
0 Kudos


1) You can only change the base units of measure under the following circumstances

• No stocks are available for the material.

• There are no existing purchase requisitions, purchase orders, or scheduling agreements for the material.

• At present, no purchase orders or purchase order items are being created or changed.

If requests for quotations, purchasing info records, or contracts are available for a material, the system emits a warning while changing base unit of measure. Still if you want to change unit of measure specify in a dialog box the factor for converting the base unit of measure into the new base unit of measure. The purchasing info records are then, if necessary, updated.

As system is not allowing changing base unit of measure there will be either stock of this material or existing purchase document

1) If there are stocks in the previous period, you can clear them as follows:

a) Post the stock in the previous period to the current period (for example, using movement type 561) so that the stock for the previous period is the same as the stock for the current period.

b) Clear the stock with the posting date in the previous period (for example, using movement type 562).

• 2) If there are Open purchase requisitions, purchase orders, or scheduling agreements for the material.

We suggest completing all P2P cycle for open orders (purchase requisitions, purchase orders, or scheduling agreements) and then close it.


1. Run Trnx MM02 (Change Material Master immediately.

2. Overwrite the old base unit of measure with the new one in basic data screen.

3. Save the change.


reward if usefull

Answers (1)

Answers (1)

Former Member
0 Kudos

hi jack

Go to material master mm02 and enter the new UOM. System will definately do not allow you to change UOM. But it give you an error message and an ICON "Display error" will appear at the top. Click on it and try to clear the documents.

You may have to -

Reverse GR.

Delete or Block all PO / PRs.

Delete Reservations.

Remove the material from bills of materials.

Close any other scheduling agreement.



Reward if this is helpful..