/sys$common/syshlp/helplib.hlb CC, Run-time functions, clearerr  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Resets the error and end-of-file indicators for a file (so that
  ferror and feof will not return a nonzero value).

  Syntax:

       #include <stdio.h>

       void clearerr(FILE *file_pointer);