This function retrieves the distance of a node along a particular element set.
GetNodeDistanceAlongSet (string DatabaseName, string SetName, int NodeIndex)
DatabaseName (character string). The full path name to the relevant database.
SetName (character string). The full name of the relevant set.
NodeIndex (integer). The relevant node index.
-9999998 (if there is an issue with the database file)
-9999999 (if there is an issue with the nodes)