You maybe having a problem with the entries in the <guide.dat> file.
Here is a snippet of my that file pointing out the different possibilities.

-----------------
LIS_1120=63
DLG_1121=18333-2357
DLG_4621=5189
UCAC4_PATH=c:\guide9\ucac4
DLG_4625=1018
MPCORB_PATH=C:\asteroid MPC\SMPC\MPCORB.dat
DLG_3025=MPCORB_PATH=C:\asteroid MPC\SMPC\MPCORB.dat
DLG_4100=6543
DLG_4641=873
DL
-------------------------------------End
I used <Alt J> to enter the path for the MPCORB data and used a direct entry into
<guide.dat> for the path to UCAC4.
You see that the MPCORB entry has a second line of code associated with it. If you
alter the one line without altering the second one it will not access the data.
Easiest to delete both lines and change by using <Alt J>.

The second possibility for error. Are you sure you have all the UCAC4 data. Check
properties of Folder -- should be: Size 8.29 GB,
Contains 901 files,0 folders

I know the frustration as I struggle with Bits and Bytes but I have a good Guru to
assist me.
Hope this of some help.

Larry Wood

On 2016-11-11 12:50 PM, 'Blair, Grant' g.blair@... [guide-user] wrote:
> Hi All,
>
> I don’t think I am a particularly inept person in general, but getting Guide 9.1
> (10 Dec, 2015 version) to access UCAC4 (locally on the same HD as Guide) eludes me.
>
> I downloaded the entire UCAC4 tree from cdsarc.u-strasbg.fr/pub/cat/I/322A/UCAC4
> into D:\UCAC4 on my laptop, keeping the relative directory structure.
>
> I have Guide 9.1 installed in D:\AstroData\Guide9
>
> I have the following in GUIDE.DAT:
> UCAC4_DATA=D:\UCAC4
>
> I have UCAC-4 flagged with an asterisk in Extras-Toggle User Datasets and the
> ‘on’ radio button is selected, as is display at a scale of 0 – 1 degrees.
>
>