Hi, I am trying to install autoconf 2.59 on Sun Solaris for which GNU's M4 1.4 is required. So, I installed GNU's M4. As far as I am concerned there is no problem in the installation of M4 1.4 and it is installed in /usr/ccs/bin. But when I try to install autoconf I get an error message which says that GNU M4 is required. I am unable to figure out the reason of this happening. I would appreciate your feedback about this. Please help me in solving this problem. Thanking you in advance. Your sincerely, Kaushik Chaudhury Ushacomm India Pvt Ltd., Kolkata, India