Specifies that a new browser help volume should be created even if the family files and help volumes on the system have not been modified.
Specifies the name of the help volume and any intermediate files generated by dthelpgen. The default name is browser.hv.
Specifies which language directories to search for help families and help volumes. If the -lang option is set, it takes precedence over the current value of the LANG environment variable.
If you run dthelpgen while the browser volume is displayed in a help window, you should close the window, then reopen the browser volume.
dthelpgen(1) man page