Bill,
My machine originally came with Windows 8, and has since been had the OS
upgraded to Windows 8.1
I do not have any problems running HFTA on this machine. I cannot recall
having to do anything in particular to get the s/w running. This is the
disc from the 22nd edition Antenna book. I seem to recall reading that
the disc supplied with earlier editions would not work with the newer
versions of Windows.
I splurged on a new Antenna book for this reason.
I realize that this is scant comfort for you. I assume you have tried
the 'Run as Administrator' trick, etc. (Although your problem does not
appear to be a permissions problem.)
Now, if I could only figure out a way to get MorseRunner to work
properly under 8.1 .....
Good Luck;
John N7ZN
On 18-Jul-2014 1125, William Hein wrote:
> Can't say I love Windows 8.1 but that's what came my new PC.
>
> I loaded HFTA from the ARRL Antenna Book CD-ROM along with the other
> programs on that disc.
>
> I am able to open HFTA, enter data and display the Terrain Profile however
> when I select Compute I get a YTW (not HFTA) error message:
>
> Run-time error 91
> Object variable or With block variable not set
>
> I tried running HFTA under Windows compatibility mode Windows XP (SP3) but
> that doesn't help.
>
> I am building a large rotating tower system this fall and need to figure
> out what heights to put the Yagis.
>
> Thanks
>
> Bill AA7XT, ex-AA6TT, ex-NT1Y
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