问题：
I'm new to mac with not familiar on terminal command, i put the dvtcolorconvert.rb file on root directory of my volume, this ruby script can converting xcode 3 themes into xcode 4 themes format, which is xxxxxxxx.dvtcolortheme format.我是mac新手，对终端命令不熟悉，我将dvtcolorconvert.rb文件放在我卷的根目录下，这个ruby脚本可以将xcode 3主题转换为xcode 4主题格式，即xxxxxxxx.dvtcolortheme格式。
Then run the script /dvtcolorconvert.rb ~/Themes/ObsidianCode.xccolortheme on terminal, but it's always prompt " Permission denied ".然后在终端上运行脚本/dvtcolorconvert.rb ~/Themes/ObsidianCode.xccolortheme ，但总是提示“ Permission denied ”。
what's wrong with this?这有什么问题？ Anybody can help me solve this problem?有人可以帮我解决这个问题吗？ Thanks.谢谢。