This compiler error will occur if the parameter you pass to the function IsInitialized is anything else than a global variable.

var
   nTemp // a local variable
begin
    if IsInitialized(nTemp)
 
    endif
 
    if IsInitialized(33)
 
    endif
 
end

Note, however that any type of global variable can be passed as parameter.

Topic 109905, last updated on 18-Apr-2020