There's no easy option. One solution is to merge the cell across from your condition column - if someone duplicates a row they'll still have the value merged and it looks nicer than having a column of N/A The other approach I tend to use is just to set the column heading to be "must be N/A" rather than retract the person. Thomas From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Bruno Freudensprung Sent: 07 September 2011 12:19 To: Rules Users List Subject: [rules-users] Decision table empty action cell Hi, I am implementing a decision table that looks like: CONDITION ACTION $p : Person name == "$1" retract($p); Person name Retract the person Fred N/A Kenny N/A The problem is generated rules have an empty RHS unless I put a string (here N/A) on each line of the Action column, and I'd like to hide this column in my final spreadsheet. Does anyone know a way to instruct Drools to generate the LHS even if the cell is empty? If it is not possible, do you know any Excel trick to automatically fill the Action cell with an arbitrary value (here N/A) when a new line is inserted in my table? Many thanks in advance for your help, Best regards, Bruno. ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************