In the Customization screen, set Product ID to CTM.
Select major step "Customize Control-M Dataset Parameters", minor step "Control-M Datasets Parameters".
Change parameter HSTSIZE with the new History Jobs file size.
Perform step "Save Parameters into Product Libraries".
Rename the original HST file, using any new name.
Use the modify command HISTALOC=DISABLE to deallocate the HST file from the Control-M monitor.
Perform step "Format the History Active Jobs File", and submit the job. This step allocates and formats a new HST file. The DD statement points to the History Active Jobs file.
Rename the original HST file, using any new name, then rename the new HST file to the original file name.
If you want to copy the contents of the old HST, use the CTMHCOP utility, and set the appropriate old and new HST files accordingly.
Resume all activities against the new file (meaning, reenter IOA online environment)
