Library /sys$common/syshlp/ncphelp.hlb SET, EXECUTOR, MAXIMUM VISITS number  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies the maximum number of nodes a message can visit prior to
 being received by the destination node.  Use a number in the range of
 MAXIMUM HOPS parameter to 63.  You should specify a number that is
 twice the MAXIMUM HOPS value.  The default is 63.