Accessing Files Programmer's Guide (32650-90885)

Chapter 10 139
Updating a File
In appendix A, "HP Pascal Program Examples," example A-5 is an HP Pascal/iX program
that uses the procedure in example 10-1 to update records in a disk file. For more
information about FUPDATE parameters, refer to the MPE/iX Intrinsics Reference Manual.
NOTE A magnetic tape device is not designed to enable the update/replacement of a
single record in an existing file. Problems occurs in maintaining the integrity
of tape records if you attempt to perform a record update operation directly to
a magnetic tape file. You should update individual records of a magnetic tape
file only when you are copying the entire contents of that file to another file.