The most common cause of this error message is using "Easy Install" to install DAL. You need to use the "Custom" install option when installing DAL to load the DCA drivers.
Be sure to add a ":1" at the end of your script in your host.cl1 file whether running in CUT or DFT mode. You need to do this for MacIrma DAL driver 1.1.0 (or later), the only version DCA is supporting.