Hi Folks
EDIT -
TeaSea posted while I was composing.

P.S.
Reloading mission wouldn't solve,
as SimVar.exe is loaded on launching FSX.
TeaSea -
As Dain points out, SimVar.exe is a component of Jim Keir's FSXME package.
If as you say SimVar.exe is already running,
and the missions cannot find it,
then it's most likely a permissions or compatibility-mode issue.
For a definitive answer,
please post a question at
Jim's FSXME forum at FS-Addon,
or notify the mission's developer to do so.
Meantime,
and only guessing here -
are you by any chance using Windows 7 ?
and if so, is it the 64 bit version ?
With FSX and SimVar.exe not running,
you could try -
- Find SimVar.exe, (should be in C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\Extensions\)
- Right-click on SimVar.exe
- Displays the Context menu
- Left-click Properties
- On the Comptibility tab.
- Tick the "Run this program in compatibility mode"
- From the listbox, select Windows XP (Service Pack 3)
- Click Apply, OK.
Now fire up FSX, and lauch one of those missions requiring SimVar.exe.
Does the mission work correctly now ?
Everyone -
SimVar.exe Overview
Think of SimVar.exe as an FSUIPC for FSX Missions.
SimVar.exe was originally only intended to
fill the gaps/repair broken aspects of the FSX mission system.
It now adds 20 commands to the FSX mission system,
and substantially extends the testable variables,
to approx 800 via FSXME/SimVar.exe,
versus 36 via the OPT, (60 in FSXA),
plus allowing you to set most writable variables.
It also works in a similar way to FSUIPC
listening for instructions or information
and injecting commands via SimConnect.
For a detailed explanation,
plus some mechanism demo missions,
please see -
Expanding your Missions
PS Important
To access additional SimVar.exe commands, (not present in first release).
Ensure you've downloaded/installed the latest FSXME build, (v 1.0.1766)
from the
Latest Build thread in -
Jim's forum at FS-Addon.
That version includes an online updater.
Click Menu -> Help -> "Check for Updates"
which'll give you the current version, (v 1.0.1786)
You should also download Jim's MercRescue sample/demo mission
(from my link in that same thread),
as it demonstrates how to implement many SimVar.exe commands.
HTH
ATB
Paul