Need to change the column size from 255 to 2000 in the jbpm database.

Hi All,
Tried changing the column size by adding the argument -Dorg.jbpm.var.log,length = 2000 in the standalone.conf of the jbpm directory and the standalone-full.xml with this property. This dint work for me.

The link which i gone through is https://pavanandhukuri.wordpress.com/2015/01/27/increase-the-default-process-variable-size-in-jbpm/ as mention in this link i cannot find an build.xml file.

Please help with the resolution.

Regards,
Karan