If Modelica overrides a time schedule or an actuator at a time
instant that does not coincide with an EnergyPlus time step, the
change in value may be ignored for the heat balance of the current
EnergyPlus time step.
This will be addressed through issue
2000.
Spawn stops with an error message if run from a directory that contains spaces (because loading the FMU would fail). Therefore, make sure the working directory has no spaces. The installation directory of the Buildings library however is allowed to have spaces.
This error check has been introduced in issue 3993.