Maybe you can find your answer in this post
Now, my 2 cents, sometimes there is a problem running the emulator when you have your phone plugged at the same time. You could try unplugging your device first.
But perhaps, debugging with the emulator isn't what you want. I recommend to start the ddms
tool. And use a query to search what you need, like one of these: tag:ti
, tag:tia
, tag:tiapi
In order to do that, open a terminal and go to your android sdk folder, cd tools, and run ddms
command. You can find where is your android sdk folder looking into Titanium Studio -> Preferences -> Studio -> Platforms -> Android.
Edit
Another option is to run titanium commands from a terminal pointing to your project folder:
cd "path/to/your/project/folder"
# in case of using the emulator
ti build -p android
# in case of using your device
ti build -p android -T device