I already have WAMP2.5 (PHP5.5.12) on my windows7. I wanted to try Laravel and started with installation on Composer which is done. I have downloaded Laravel master.zip from github and placed it in c:\wamp\www\laravel. Now I am trying to install Laravel (composer install) and ending up with error exception like:

[ErrorException] fopen(): Filename cannot be empty

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--o-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [--ignore-platform-reqs] [packages1] ... [packagesN]

Please help me in understanding what is wrong in the procedure.