# Where Used Update (WU.P1)
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Form Details
Form Details
Purpose
The WU.P1 procedure clears and rebuilds the Where Used file (WU) based on the
data in the Bill of Material file.
Frequency of Use
Where used information is updated automatically when changes are mode with the BOM.E procedure. You will need to run this procedure if bill of material data was loaded from a conversion data from another system or if you determine that a corruption of the where used file (WU) has ocurred.
Prerequisites
Entry of Parts records ( PARTS.E ) and Bill of Material records ( BOM.E ).