Hi Zeta, Just to confirm: You'll find that writing an Excel VBA macro will not work, as they are neither MVEL nor Java. How I've handled it is created a Helper class with public static methods. Then in the Import section at the top of the file, I link to the functions I use, prefixed with the "function" keyword, eg: RuleSet myRuleSet Import nz.co.bnz.projectname.common.factmodel.*, function nz.co.bnz.projectname.helpers.HelperClass.methodName Functions dialect "mvel" ... Of course the main advantage of using helper classes like this is you can reuse them - no need to rewrite your methods everywhere you want to use them. Of course this isn't particularly helpful if you're not coding in Java. Note: Under mvel you seem to need to specify each function name separately, when using Java you can use HelperClass.* - This applies to any rules file-type (.drl / .dslr / .xls / .csv / etc) Hope some of this helps, -Trav Travis Smith Analyst Programmer Development Centre BNZ DDI: +644 4746356 (Or Ext 76356) zeta <zoraidahidalgo(a)gmail.com&gt; Sent by: rules-users-bounces(a)lists.jboss.org 05/05/2011 03:38 a.m. Please respond to Rules Users List <rules-users(a)lists.jboss.org&gt; To rules-users(a)lists.jboss.org cc Subject [rules-users] SPREADSHEET DECISION TABLE: Can I use functions into CONDITIONS? HI!, I need to check if a given date is between two dates. So, I would like to call a function that calculates if the given date is between other two(specifically, between current date and current date plus some months, and the variable "months" changes dynamically). I tried to write a function(inside spreadsheet) that receives the date and the variable months but does not compile. I have found not samples about functions used into condition part so I am wondering if that is the problem. If it is the case, what can i do? Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/SPREADSHEET-DECISION-TABLE-Can-I-use-fu... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. This email was sent by the Bank of New Zealand. You can contact us on 0800 ASK BNZ (0800 275 269). Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Bank of New Zealand.

Doesn't the dump show anything relating to isInRange or Utils.*? Have you tried try/catch in isInRange, and printing its arguments? -W On 10 May 2011 12:08, zeta <zoraidahidalgo(a)gmail.com&gt; wrote: