You are using a deprecated Browser. Internet Explorer is no longer supported by Xilinx.
AutoESL - Variable does not appear in the GUI's directive pane
Although the design synthesizes correctly, my variable does not appear in the GUI's directives list.
This visual issue is resolved in AutoESL version 2012.1.
To ensure that the directive pane shows all variables, check the "Parse all header files" option under the General tab in Project Settings.
For AutoESL 2011.4.2 and before, directly apply a directive on the variable in the code or with the directives.tcl constraints file.