STM32F7 - Unable to Select I2S Mode for SAI1 in CubeMX

[Extra]

Hi: My goal is to perform full-duplex I2S using the STM32F722RET6 part. To achieve this using the pins available on the package it looks like I need to use SAI2 (sub-block B) as the master/TX and SAI1 (sub-block A) as a slave/RX synchronized to SIA2.

The configuration of SIA2 in CubeMX works fine.  However, when I attempt to configure the slave side (SAI1-A) the I2S option is greyed out (see below). Can anyone help me to debug this? Many thanks, Bruce.

[Extra]

CubeMX version is 6.17.0.

[Ghofrane GSOURI]

Hello @Extra 

It would be great if you could share your IOC in order to check your configuration and see whether there is a conflict.

I will be waiting for your feedback.

Thx

Ghofrane 

[Extra]

Hi Ghofrane:

Thanks so much for the help. I have attached my IOC file. 

Bruce