Hy, I had a mistake on a function of a package i have created! I have solved it and then i repackaged and installed the modified package. I use to launch R from Excel! And so when i launch R, and next call my function from the workspace, i still find the problem on my function. And when i read on my workspace, the source code of my function, i find the old version of my function (the one from the precedent version of my package)!!!!!!!!!!!!!!!!! If one of you have ever met this kind of problem, could you help me. Thanks Samy Khezami -- Samy Khezami M.S. Quantitative Finance EM Lyon Business School 0033625430829 samy-khezami.mas@em-lyon.com [[alternative HTML version deleted]]