If you rely heavily on enums, you might consider using a userfunction
that binds enum constants to Jess variables - so you don't need the
parentheses.
http://www.jessrules.com/jesswiki/view?BindEnumUserFunction
-W
On 12/03/2012, Friedman-Hill, Ernest ejfr...@sandia.gov wrote:
The Jess language
The posted error message still puzzles me. My recollection has it that
Jess reports quite accurately the statement where the exception was
raised, not just the outermost control statement. Moreover, all levels
between the outermost and innermost statement are displayed as well,
so that you can
Are you sure that
(?*bwapi* getMyUnits)
returns a list?
Jess' foreach isn't quite as tolerant as for in Java 1.5 and later.
You may have to return an java.util.iterator.
-W
On 10/03/2012, Hunter McMillen mcmil...@gmail.com wrote:
I am receiving the error in the subject line when one of my
Thanks for your response Wolfgang,
Yes, getMyUnits() returns an ArrayListUnit; I don't believe this likely
to be the problem since I have these in other rules that are functioning.
More debugging shows that the error is occurring in routine
Value.stringValue. Do you see anywhere where I am trying
The other place that it might be is in the line
(if (= (call ?u getTypeID) ?*SCV_ID*) then ...
because the = function does a comparison by *value*, so it would likely
use Value.getValue().
What do your ID's look like? Are they numbers or strings, or something
else?
If they are strings, then
Here is the stacktrace:
Message: '' is a list, not a string.
at jess.Value.a(Unknown Source)
at jess.Value.a(Unknown Source)
at jess.Value.a(Unknown Source)
at jess.Value.stringValue(Unknown Source)
at jess.Value.symbolValue(Unknown Source)
at
That was exactly the problem, thanks. What is the general rule for function
calling in Jess, always without parentheses? I never would have caught that
error because when I see something like get-next-build-tile() the
parentheses tell me it is a function. Seeing it without the parens makes me
Good gravy! This is one of those can't see the forest through the trees
examples that we used to collect on the jess wiki! It was hiding in plain
sight!
One lesson from this is that Jess's error messages, even when seemingly
cryptic, contain some useful clues. Users, myself included, are too
