purchase order still contains faulty schedule lines

[arora_ashish1]

I am facing error while creation of purchase order and the error is " Purchase order still contains faulty schedule lines for line item xxx". Can any body help on this ?

[JL23]

Why is this tagged with SD too? Is it about third-party orders?

In which transaction do you get the error? In ME21N or eventually in a BAPI?

If it is about a BAPI, please explain why the existing solutions for similar discussions are not relevant for your case?