<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Ah, really interesting! In the attached ex321f.F90, I create a dummy KSP before the loop, and indeed the behavior is as you say - no duplications</body></html>