To add to Wolfgangs response, you are missing

public static final int HIGHROADS = 4
in the Assignment class, also since you are updating Assignment in the rule actions you should either put NO-LOOP on each of the rules, or you could use a "trick" to set "lock-on-active" on a package level (see uploaded xls). With the also uploaded test, the results I am getting are:
*****
Knowledgebase read
All rules fired
Status: 0
Message: Heavy snow and cold. Medium clearance on main roads
*****
and you can also see the generated DRL (using SpreadsheetCompiler). Checking the generated DRL of your decision table is useful for debugging in the future.

Hope this helps ;)

Thanks.
Tihomir

On 12/27/10 10:13 AM, Wolfgang Laun wrote:

Hi Frank

Join C8:F8 and change the contents to
a:Assignment() and w:Weather
all conditions deal with Weather - they'll be inserted into the last pair of parentheses that will be added to Weather. (The "and" is redundant as it is implied for patterns at the outermost level. There should be a single Assignment fact, and I guess there is only one Weather.)

I would not add an update(a) to each individual action; another ACTION column with $param; in row nine and "update(a)" in all rows below lets you remove the repeated "update(a)" from H9:J9. (But this is, perhaps, a matter of taste.)

Cheers
Wolfgang

PS: Regretfully, this set of rules is going to be late for this winter ;-)

On 27 December 2010 10:23, FrankVhh <frank.vanhoenshoven@agserv.eu> wrote:

Hi all,

I am a brand new user of the Drools-tools and am not quite comfortable with
the tools yet. The current problem I am having, is caused by an "Unknown
parsing error" in a decision table.

>From past experience, I guess I have made a syntax error somewhere in the
file. However, I am not able to detect the error myself. Probably it is a
quite simple mistake, caused by a combination of inexperience and
neglectance :-).

I figured I could use an extra pair of eyes and was hoping that some
friendly community member could help me out on this.

I will annex the table as well as the java code that contains the java
classes (the table isn't callad from the code yet).
http://drools-java-rules-engine.46999.n3.nabble.com/file/n2150980/strooidiensten.java
strooidiensten.java
http://drools-java-rules-engine.46999.n3.nabble.com/file/n2150980/clearance.xls
clearance.xls

Thank you very much in advance!

Kind regards,

Frank
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