Check lot issue

Hello All,

We got one Check lot (0001-1000) and due to business reasons, User voided Checks from 0312-0500.

Now, When he executed Payment run, Checks are not generated and error says that Check lot is full.

My doubt is that when Checks are available from 0501-1000, Why we are getting this errr0r.

When I executed FCHN, It shows that Checks are voided from 0312-0500 and in FCHI, I see that Number status is at 1000.

Pls check and advice me. I have done basic investigation, however could not find out the reason.

Thanks