An easy way to modify an object field without writing a C program is using
wtdriver6.
You can find it and download it from:
http://www.rs6000.ibm.com/resource/aix_resource/Pubs/redbooks/htmlbooks/sg2
44515.00/4515fm.html
It is all the "Netview V4 Examples" redbook, in Appendix A there are
instructions to download
the wtdriver6 code. The "readme" in the tar file gives you all the help you
 need to set fields, add objects etc. from
command line.
It works also with TME 10 Netview V5.1.
Hope this helps.
Bye Massimo Carnevali - IBM Global Services - Italy