You can pay a fee to convert some weeks to RCI Points (only if the resort is affiliated with RCI Points) but usually cheaper to acquire one already converted.
Could be they were talking about the points for deposit program to convert a single week that is already deposited into RCI points. That only works if you own both in weeks and points and if the deposited week is at a resort that isn't affiliated with RCI points, which is in place so that this program doesn't compete with enrolling an ownership in RCI points. The fee for the program is $49. Enrolling in points is how I think of what you're talking about.
From the RCI Help Library on the subject:
What is Points for Deposit?
Points® for Deposit allows RCI Points® subscribing members, who also own an eligible week at an RCI Weeks affiliated resort, to deposit that week with RCI and receive Points for that deposit. They can then use those Points in the RCI Points exchange program.
By combining your ownerships in this way, you can increase your Points balance and increase the flexibility of RCI Points membership, opening up possibilities for stays at resorts for which you may otherwise have had insufficient Points, longer trips or even more trips.
Even if your week is already deposited in the RCI Weeks exchange program, if it is eligible for Points for Deposit, you can still take advantage of this program. You can convert up to 4 eligible weeks per resort per calendar year to Points through the Points for Deposit program.
How many Points will I receive for my eligible Week?
The number of Points that you’ll receive depends on various factors such as unit size, resort quality, season and location. The timing of the deposit is also a key factor:
The Points you receive for your week will be allocated to the Use Year in which the start date of the week you are depositing falls, and it can take up to 15 days for the Points to be deposited into your account.
How do I use Points for Deposit?
Currently, Points for Deposit is not available on RCI.com. Please call an RCI® Vacation Guide at 1.877.968.7476 to take advantage of this great benefit.