Base qty UOM for BOMs

Hi
I am creating a BOM for material M1 with a component C1. For M1 I cannot change the base qty unit of measure. It defaults to the base unit of measure as defined in the Material Master of M1. Is there a way I can use a alternate UOM for M1 in the BOM?
thanks a lot

Dear Mr.John,
The Unit of measure given in material master will be taken while creation of BOM.
Even if u have manitained some unit of Issue in the material master for the same material,this wont be considered by the system.
So if you want to change the unit of measure,it can be done only in material master.
But if there exists stock or some open order quntity u can't change the unit of measure and the system throws you an error message.
For Eg:
The base unit of measure cannot be changed; choose "Display errors"
Message no. M3189
Diagnosis
You wanted to change the base unit of measure. However, you can do so only under certain circumstances, including the following:
 If there are no stocks of the material in the current period and in the previous period
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).
 If no purchase requisitions, purchase orders, or scheduling agreements exist for the material
Procedure
Choose Display errors to see why you cannot change the base unit of measure for this material.
The pushbutton Display errors appears only in dialog mode, not in data transfer or in mass maintenance. If this message appears in data transfer or in mass maintenance, and you want to know why the base unit of measure cannot be changed, access the material in dialog mode using the relevant transaction below, try to change the base unit of measure as required, and then choose Display errors:
If I'm wrong please correct me Mr.Nandha.
Reward points and close the thread.
Regards
Mangal
Message was edited by:
 Mangal

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Edited by: Harris Panchal on Feb 17, 2010 6:58 PM

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