PDF generation loop issue

Question

We have a project in which we generate multiple pdfs in a loop. As per the loop, around 1000 pdfs should be generated. But only 27 are generated. It gets stuck at the 28th pdf every time. We tried generating the 28th pdf seperately and it generates fine. Then we tried initializing the loop from 27 and it generates the 28th pdf. This has made us come to conclusion that there might be some problem in the package or in the loop. We also tried to upgrade the pdf package but it didn't work.