Problem VA03 Item Overview, fields CnTY and Amount blank

[maria_merino]

Hi experts,

I have this issue.. in sales orders, VA0*, in tab "Item Overview", there are some positions in which fields CnTy and Amount are blank while in the rest of the items are informed. See image below.

When displaying item conditions everything is similar to other positions:

Any idea of waht is happening ?

Thanks in advance,

María