I believe I was getting this when I was running OS X 10.7 server and Wowza Media Server 3.5; I am getting it in OS X 10.9 (client) -- same computer, just upgraded (note: the output that follows is not something I've typed a command to cause):
Last login: Thu Jul 10 15:23:05 on console
mole:~ admin$ cd /Library/WowzaMediaServer/bin;./startup.sh;exit
-bash: cd: /Library/WowzaMediaServer/bin: No such file or directory
-bash: ./startup.sh: No such file or directory
How can I create Terminal windows/tabs without this happening?
Do I need to manually delete a script, or a line in a script?
I've seen it in the past that OSX upgrades will remove some items if it thinks it doesn't need them. The last upgrade I did wiped out all of my custom java installations and I had to reinstall them. It's quite possible that the upgrade removed the Wowza folders from the Library folder. If you have been using Time Machine then you may be able to restore them, otherwise a reinstall will be needed.