We released two new updates for Multi-Sandbox MicroEJ Firmware on developer.microej.com both for the STM32F746-DISCO  evaluation board from STMicroelectronics.
The update version 1.3.8 for the BLUE  firmware and the update version 1.11.4 for the YELLOW  one are allowing more data types to be used with the Multi-Sandbox framework.
The YELLOW and BLUE Firmware are available through developer resources . You can flash them by following the first section of the getting started at developer.microej.com .
The MicroEJ Team