Diagnosis
Your system configuration means that values cannot be set in thefollowing fields for sub-items:
KWMENG = Sales order item quantity
VRKME = Sales unit
UMVKZ = Conversion numerator
UMVKN = Conversion denominator
ZMENG = Sales order item target quantity
ZIEME = Target sales unit
UMZIZ = Conversion numerator
UMZIN = Conversion denominator