Dear all, When I do make for Perl ESL libraries in "esl/perl" directory I have got the following error. /usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o: In function `_start': ../sysdeps/i386/elf/start.S:115: undefined reference to `main' esl_wrap.o: In function `_wrap_eslSetLogLevel': esl_wrap.cpp:(.text+0x1c10): undefined reference to `eslSetLogLevel' esl_wrap.o: In function `_wrap_ESLconnection_setEventLock': esl_wrap.cpp:(.text+0x3395): undefined reference to `ESLconnection::setEventLock(char const*)' esl_wrap.o: In function `_wrap_ESLconnection_setBlockingExecute': esl_wrap.cpp:(.text+0x3c65): undefined reference to `ESLconnection::setBlockingExecute(char const*)' esl_wrap.o: In function `_wrap_ESLconnection_execute': esl_wrap.cpp:(.text+0x41ab): undefined reference to `ESLconnection::execute(char const*, char const*, char const*)' ........ I have understood the when creating soft link ESL.o that error has occurred. What is the problem? Is there any dependency to create that link? please help me....... Thanks Regards, Velusamy