Message: SBIE1312 Blocked request to start a 16-bit DOS program in the sandbox
Logged To: Popup Message Log.
Sandboxie blocks the execution of 16-bit DOS programs in the sandbox, because Sandboxie cannot guarantee sandbox isolation for such programs.
Note that this message only appears in the 32-bit edition of Sandboxie on 32-bit Windows, as 64-bit Windows does not run 16-bit DOS programs.
One possible workaround is to install the DOS emulation software DOSBox into a sandbox, and use that to run the 16-bit DOS program.