This bug has been fixed in Release 2007a (R2007a). For previous product releases, read below for any possible workarounds:
There is a bug in Real-Time Windows Target 2.5.1 (R14SP1) in the way that the Real-Time Windows Target kernel handles Hyper-Threading. This error is returned during communication between the Real-Time Windows Target kernel and Simulink external mode when Hyper-Threading is enabled.
The only work around for this issue, is to disable Hyper-Threading in the BIOS setup of the target machine (if the Target Machine BIOS setup allows this).
Best Answer