If you try to do something that the system does not allow, an error message is displayed. In most cases, its meaning is obvious; all you need to do is click on the close box and proceed with your work.
Two common cases arise which require you to take action. These are:
If a can't access message is displayed, you need to change the permissions on your files using the UNIX chmod command. See your operating system documentation for instructions on using this and other UNIX commands.
If a not enough disk space message is displayed, you need to remove some picture files from your hard disk. To remove a file from your hard disk, use the UNIX rm command. See your operating system documentation for instructions on changing directories and using commands.