In order that the value of the variable could affect the structure of the drawing or 3D model of the given document, it is not sufficient just to create this variable in the T-FLEX CAD document. The variable has to define a characteristic of the elements of the drawing or 3D model: location of a line or a node, the radius of a circle, the level of visibility of the image line or 3D bodies, etc.
The variables the values of which take part in specifying characteristics of other elements are considered to be used. Also, the variable is considered to be used, when its value is used for calculating the value of another variable.
Consequently, the variables the values of which are not used anywhere on the drawing or in the 3D model and also upon calculation of the values of other variables are considered unused.
Unused variables are marked by the question sign in the ? Not Used column of variable editor and Variables window.
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