forrtl: severe (40): recursive I/O operation, unit -1, file unknownI don't understand logic of error's appearence. It connected somehow with operators sort of "write(*,*) .... ", but why there is recursive operation, I don't know. By throwing out such operators I can delay error, but eventually it happens around such operator. Maybe, deleting all of them will help, but I'd like to understand what's happening. I'll be grateful for any suggestions and advice.