Diagnosis
You privation to participate oregon alteration an point successful the existent BOM with point class L. You person entered a antagonistic quantity.
However, introduction of antagonistic quantities is not supported successful the point class you chose.
The point class determines whether you tin participate lone affirmative quantities, lone antagonistic quantities, oregon both.
Procedure
Check your entries.
Enter a affirmative quantity oregon take different point category.
(I checked qty\value settings successful OMS2 they are checked successful my valuation area)