This error occurs when an invalid attribute(%s) is used in a definition(%s).
Check for spelling mistakes and use the correct attribute.
Example
[System: Variables]
Variable : MyVar
[Variable: MyVar]
Type : Logical
Defaults : Yes
In the above code, the attribute Defaults is not a valid attribute for the definition variable. So the message error T0014: The attribute 'Defaults' is not valid for the description 'Variable'. appears.
The code is corrected by changing the attribute name Defaults to Default .
[System: Variables]
Variable: MyVar
[Variable: MyVar]
Type : Logical
Default : Yes