the variable is inside Constants.h
ERROR is:
duplicate symbol _OSVShortTermFuelTrim1 in:
/Users/loximity/Library/Developer/Xcode/DerivedData/AutoCodesApp-hjoxbttreaujifdypikhbngdqihd/Build/Intermediates/AutoCodesApp.build/Debug-iphonesimulator/AutoCodesApp.build/Objects-normal/i386/ViewController.o
/Users/loximity/Library/Developer/Xcode/DerivedData/AutoCodesApp-hjoxbttreaujifdypikhbngdqihd/Build/Intermediates/AutoCodesApp.build/Debug-iphonesimulator/AutoCodesApp.build/Objects-normal/i386/FuelTrimViewController.o
and then I am using the above variables in two places, in view controller:
OSVShortTermFuelTrim1 = [NSString stringWithFormat:@"%@ %@", [sensor valueStringForMeasurement1:NO], [sensor imperialUnitString]];
and in FuelTrimViewController"
fuelBank1.text = [NSString stringWithFormat:@"%@",OSVShortTermFuelTrim1];