(Exec error:Launching failed) for Eclipse

I got the following error in eclipse console when I compile LPC2368 Webserver project **** Build of configuration Default for project RTOSDemo **** (Exec error:Launching failed) much appreciated if you help me with this thank you

(Exec error:Launching failed) for Eclipse

Do you have the bin directory of your compiler in your PATH environment?  Also do you have make in the path? Open a command prompt and type arm-elf-gcc.  Is the command recognized.  Do the same typing make.