Hello, I would like to do is when the CO2 reaches 1000 ppm, the window will open. And I used EMS set the C02 concentration of the zone as a sensor. However, there is always an error: "unique key name not found" in the file, showing on the following. I was wondering if anyone could tell me how to create a unique name in "EnergyManagementSystem: Sensor". Thanks in advance.

 ** 
* Severe  ** * Invalid Output:Variable or Output:Meter Index Key Name =CARBON DIOXIDE
   ** *   ~~~   ** * For Output:Variable or Output:Meter = ZONE AIR CO2 CONCENTRATION
   ** *   ~~~   ** * Entered in EnergyManagementSystem:Sensor=CO2_CONC
   ** *   ~~~   ** * Unique Key Name not found.
   ** *  Fatal  ** * Errors found in processing Energy Management System input. Preceding condition causes termination.

Hello, I would like to do is when the CO2 reaches 1000 ppm, the window will open. And I used EMS set the C02 concentration of the zone as a sensor. However, there is always an error: "unique key name not found" in the file, showing on the following. I was wondering if anyone could tell me how to create a unique name in "EnergyManagementSystem: Sensor". Thanks in advance.

* Severe * Invalid Output:Variable or Output:Meter Index Key Name =CARBON DIOXIDE * ~~~ * For Output:Variable or Output:Meter = ZONE AIR CO2 CONCENTRATION * ~~~ * Entered in EnergyManagementSystem:Sensor=CO2_CONC * ~~~ * Unique Key Name not found. * Fatal * Errors found in processing Energy Management System input. Preceding condition causes termination.