[rules-users] Re: beginner needs help

[Alexander Claus]

Hi Senlin,

> 
> Hi all,I just started using Drools. I tried to run some example, but they 
all give me errors.
...
> Exception in thread "main" org.drools.RuntimeDroolsException:
> Unable to load dialect ...
> Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in 
the classpath

probably you have not all needed JAR files on your classpath.
It depends on your needs, which JAR files you have to include, but I think, 
for the beginning, when you want to build rules using DRL, you have to 
reference:
- drools-core***.jar
- drools-compiler***.jar
both from the drools main directory and further
- antlr-runtime***.jar
- core-3.2.3***.jar
- mvel***.jar
from the lib directory.
I guess you know how to include the JARs in the classpath?

If there will be similar exceptions afterwards, perhaps have a look at the 
remaining JARs in these both directorys, if you need one of them.

> Is there any simple instructions for beginners?
...

The documentation of Drools should help you to continue. See 
http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/html/ch03.html#d0e1349 
for the section on needed JAR files. At bottom there is an interesting 
document referenced: readme_dependencies.txt

Alexander