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You do not need to wipe th AB database.
I actually use my weekly sort of symbols into their groups
(equity/derivative/index etc) to find the null symbols. The AFL
function CategoryAddSymbol does not move symbols that have no data, so
by starting all in Group0 what is left behind are the null symbols.
These can then be deleted in AB.
--
Cheers
Graham
AB-Write >< Professional AFL Writing Service
Yes, I write AFL code to your requirements
http://e-wire.net.au/~eb_kavan/ab_write.htm
On 12/10/05, John R <jr-ta@xxxxxxxxxxxxxxxxx> wrote:
> Just a note of caution - in my experience you need to be careful when using
> MS Plugin and doing database maint on the MS files (adds, renames, deletes
> etc.). AB does not sync dataabse with MS directories so even with a Retrieve
> you can end up with database problems, incoreect/dead links etc. Only safe
> solution I have found is to effectively wipe the AB database before doing a
> Retrieve.
>
> The MS Plugin also used to truncate the MS symbol names - not sure if it
> still does as I now use alternative method to get full symbol names into AB.
>
> John
>
> Original Message -----
> From: "Glenn" <glennokb@xxxxxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Saturday, December 10, 2005 2:15 AM
> Subject: [amibroker] Re: Data not updated
>
>
> > Thanks Richard,
> >
> > I've just done what Graham suggested as I'm using the Metastock plug-
> > in.
> >
> > I had already retrieved the symbols as you mentioned before I asked
> > about this and as you say, it would be nice if it was automatic to
> > retrieve new symbols.
> >
> > I remember when I first started using Amibroker (couple of years ago
> > now), I thought it was strange that this was not automatic. It's just
> > a click, but would be good to have an option to automatically retrieve
> > on startup.
> >
> > Cheers, Glenn
> >
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Richard Dale" <richard@xxxx> wrote:
> > >
> > > Glen,
> > >
> > > If there are any symbol changes (due to new listings, delistings and
> > code
> > > changes) in the Metastock data format, Amibroker needs to be told to
> > > retrieve the symbols again. You should periodically click the
> > Retrieve
> > > Symbols button inside the File -> Database Settings configuration.
> > >
> > > It'd be great if Amibroker would periodically do this (perhaps upon
> > opening
> > > of the database) as it only takes half a second or so on my PC even
> > with
> > > lots of data folders. In fact, I'll send this in as an improvement
> > request
> > > on the Amibroker web site.
> > >
> > > Best regards,
> > > Richard Dale.
> > > Norgate Investor Services
> > > - Premium quality Stock, Futures and Foreign Exchange Data for
> > > markets in Australia, Asia, Canada, Europe, UK & USA -
> > > www.premiumdata.net <http://www.premiumdata.net/>
> > >
> > >
> > >
> > > _____
> > >
> > > From: Glenn [mailto:glennokb@x...]
> > > Sent: Saturday, 10 December 2005 8:40 AM
> > > To: amibroker@xxxxxxxxxxxxxxx
> > > Subject: [amibroker] Data not updated
> > >
> > >
> > > Hi,
> > >
> > > I have a stock that is merging with another. The first stock ABC is
> > > worth approx $13 and the second XYZ is approx $4. I will get 4.234
> > XYZ
> > > shares for one of the ABC shares.
> > >
> > > What I have done is addtocomposite ABC divided by 4.234, then
> > renamed
> > > it to XYZ.
> > >
> > > Now I have downloaded data for XYZ but it is not being updated on
> > the
> > > XYZ symbol in Amibroker. If I look at XYZ under Metastock I can see
> > > it. I use Metastock data source in Amibroker.
> > >
> > > Any idea why the stock isn't updating?
> > >
> > > Thanks Glenn
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> > Please note that this group is for discussion between users only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
>
>
>
> Please note that this group is for discussion between users only.
>
> To get support from AmiBroker please send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> For other support material please check also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
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