Hello Mehdi, PCRE matching is implemented. PCRE replace is not yet implemented. I've added a note to the backlog to add a replace function. Ken B. -- Ken O. Burtch IT/Security Architect, Author, Creator of SparForte programming language BSc (Hon.), CSSIP, Dipl. Biblical Studies 289.432.1337 / ken at pegasoft.ca / www.pegasoft.ca/homes/kburtch.html