Hey guyz, I am trying to rebuild target for an already existing project, so that I can start making modifications to it, but the thing is the project does not compile. It says "ERROR: can't execute'C:\Keil\c51\bin\bl51.exe". I have checked the location of the files(as adviced in the previous posts) and they seem to be in the right place. Then again I tried to run just the .exe file in the DOS prompt it says 'fatal error 201: invalid command line syntax' I cant figure out if the file is bad or there is some other problem with this. I am using version V2.04