What did it say before?

The 9C's standard memory was 12 models, 18 when you used the Campac for it. Here's from the manual:

"CAMPac Memory module - the optional DP-16K CAMPac increases your model storage capability (to 18 models from 12) and allows you to transfer programs to another 9C super transmitter. Note that data cannot be transferred to/from any other model of transmitter (i.e. 8U, 9Z, etc)."