Hi, Right now I am porting an application from solaris to Red hat linux. I have faced a run time problem while running my application. The error says that " undefined symbol in the shared object" We are using dlopen() to open a library. One of the arguments used inside that dlopen() in the place of flag "RTLD_LAZY" for solaris. Should I change the argument to RTLD_NOW or RTLD_GLOBAL in Linux ? or Should I include some more options in the linker if so what are the options? I am unable to find the exact meaning of that error. Regards Phani Kumar Any suggestions would help me a lot. Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you