home *** CD-ROM | disk | FTP | other *** search
- LIMITATIONS
-
- The current version of Istar has a number of limitations. Some of them
- include:
-
- # Cannot import to KB.
- # The FIRSTOK inference method (Present Each To User) not yet
- implemented.
- # Cannot use the Import-Text yet on items.
- # Cannot at present delete value names from an attribute type; can only
- add them.
- # Certain obscure conversions between value types do not work fully; best
- to try them out before you use them. e.g. Float to Odds.
-
-
- BUGS
-
- This is a list of some bugs you should be aware of.
-
- # (Harmless nuisance) New facility in Version 1.03, Resizing of KBA,
- doesn't work; it leaves the KBA as it is.
-
- # (Harmless nuisance) The Backup button on the KB Area panel (Version
- 1.03) has no effect.
-
- # (Harmless cosmetic nuisance) Renaming the KB Area sometimes leaves
- rubbish characters at the end. Version 1.03.
-
- # (Probably harmless; POSSIBLY FIXED) There's an odd sort of bug when
- Istar runs up on some machines. It's perfectly OK on the three 1200s that
- I have tried it on (020 and 030). But when I run it up on my 4000 it comes
- up with the main easel and the SIT (Select Item Type) panel and all, but
- won't draw, and won't respond to clicks on the main control panel. Until,
- that is, I click around on the SIT panel. Sometimes dragging the listview
- scroll bar around helps, and then clicking to select an item type,
- sometimes clicking on the 'New' button. Then there is a delay of a few
- seconds, and everything starts as normal. Strange. But, as I say, on my
- three 1200s it seems perfectly OK. 9.9.96: I have found a possible cause
- of this and corrected it, but have yet to try it out.
-
- # (Harmless, cosmetic) When you reset an attribute that is in the middle
- of a network it propagates the unanswered status OK, but does not show this
- change in status on the easel. So if the Att is e.g. Bayesian and Shown it
- retains the solid black line.
-
- # (Harmless limitation) Various buttons are not operative yet:
- Clone item type
- Import text into item
- You might find others that either flash or do nowt
-
- # (Harmless limitation) Conversion Float to Odds does not work.
-
- # (Could lead to unexpected results in your KB) When a conversion does
- not work you do not get any warning of this fact. What happens depends on
- the type of conversion, but often the result holds the bit pattern of the
- uncoverted value, which might of course seem like rubbish, or might hold 0.
- 30 July 1996.
-
- # (Cosmetic, harmless; PARTLY FIXED) Version 1.02: A Form item does not
- space out the value gadgets properly always. Some of them are too tall and
- overlap others. 2 August 1996. This is being investigated. It has been
- partly cured (still untidy) in Version 1.03.
-
- # (Frustrating but probably harmless) Version 1.03: When you have two
- KBs active, and go to the Item Type Panel, and hit the Left or Right
- RelTypes buttons nothing happens. But when you get rid of all but one then
- the list of RelTypes appears OK. 5 August 1996. This is being
- investigated.
-
-
- BUGS FIXED BY VERSION 1.03 (Sep 1996)
-
- # FIXED. Version 1.02: Never press the three right hand gadgets of the
- name/meaning bar unless a knowledge base is present. It will probably
- crash the machine or send it into an infinite loop since they assume one is
- present. 2 August 1996. This has been corrected in version 1.03.
-
- # Version 1.02: When redirecting a link the DAG cycle detection algorithm
- sometimes says there is a loop when there is not. 2 August 1996. This is
- being investigated. 12 September 1996: I have found the bug: it
- occasionally searched from the wrong node. Now it should be OK in Version
- 1.03.
-
- # Version 1.02. It occasionally crashed while linking two items. I have
- found a bug that could do this, and corrected it. Version 1.03 should be
- OK.
-
-
- Copyright (c) Andrew Basden, 1996
-