Hello,
In order to use the Model Based Design Toolbox for BMS 1.2.0, you must install the Model Based Design Toolbox for S32K3 1.4.0. These toolboxes include the RTD/SDK drivers, tools used in development (gcc, S32 Config Tools) and examples. These can be downloaded from this page: Model-Based Design Toolbox (MBDT)
On the other hand, in the MATLAB Add-on Explorer, you are going to find the NXP_Support_Package_S32K3. This toolbox is solely used to help the user to install the Model Based Design Toolbox for S32K3. The Support Package can be used to install all S32K3 toolbox versions (including 1.4.0, required by the MBD Toolbox for BMS). It does not contain RTD/SDK driver, tools or examples.
Note! Each support package we deliver is able to install the toolbox just for one specific platform. For the MBD Toolbox for BMS, you need to install NXP_Support_Package_BMS.
To sum up, in order to use the Model Based Design Toolbox for BMS you need to do the following:
1. Install NXP_Support_Package_S32K3.
2. Run the GettingStarted.mlx and install the Model Based Design Toolbox for S32K3 v1.4.0.

3. Install NXP_Support_Package_BMS
4. Run NXP_Support_Package_BMS.m script and follow the steps in the installer.

5. Open the patches folder inside the BMS toolbox and extract the achieve 'NXP_MBDToolbox_S32K3xx_1.4.3_patch.zip'. I recommend you extract the achieve using the File Explorer in MATLAB, as Windows might hit some limitations regarding long paths.
6. Run NXP_MBDToolbox_S32K3xx_patch.m script located in the extracted folder.
Best regards,
Sorin Bancila