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FSX Exception 7 while Registering the struct

Messages
7
Hello gents,
In my project,I have to request ALL simulation variables.Of course before this step,I should register struct with definition name.I do but , I am getting a lot of exception 7 (Specifies that the simulation event name (such as "brakes") is not recognized.)

And I decided to find out this exception coming from which line.Here is an example:

Code:
simconnect.AddToDataDefinition(DEFINITIONS.struct1,
                    "AMBIENT WIND VELOCITY", "Knots", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);
simconnect.AddToDataDefinition(DEFINITIONS.struct1,
                    "AMBIENT WIND DIRECTION", "Degrees", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);
simconnect.AddToDataDefinition(DEFINITIONS.struct1,
                    "STRUCT AMBIENT WIND", "Feet_per_second", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);

As you see,I try to map simulation variables to my variables in struct1.But there is wrong with last variable - STRUCT AMBIENT WIND.I use names and units as the same with simconnect variables document

But I am sure that this line cause an exception 7.When I remove it,the exception is gone.
Code:
simconnect.AddToDataDefinition(DEFINITIONS.struct1,
                    "STRUCT AMBIENT WIND", "Feet_per_second", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED);

Why ? Could anyone help me ?

Thanks for any advice..
 
STRUCT AMBIENT WIND is in the ESP SDK but not in the FSX SDK. I assume you're using FSX?
 
Yeah I use FSX SDK. I could not find ESP SDK setup.How can I get it ? Or How can I see variables which is available for only FSX
 
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