I am new to this product and just getting started with STM32 microcontrollers. I have tested this on two computers both running Windows 10 Enterprise (versions 2004 & 1909). Both with a fresh install of OpenJDK8U.
The problem was related to using the OpenJDK8U-jdk_x64_windows_hotspot_8u242b08 as my Java RunTime environment. It turns out this worked fine for STM32CubeMX, but did not function with STMCubeProgrammer. I uninstalled OpenJDK8 and installed Oracle's jre-8u241-windows-x64 and this resolved the problem. However I am really trying to avoid Oracle's JRE because I work on a mix of personal and office systems and am trying to use versions of JRE that do not require corporate licensing. I received the information on OpenJDK from the STM32CubeProgrammer AppNote DB3420. I would like to point out that STM32CUBEMX also recommended Open JDK and there is a strong recommendation for the 64bit version of the JRE.
