SectionIsSelected, unknown variable

[Smurge]

Hello

I try to use the "SectionIsSelected" macro from the logiclib.nsh, but it seems not to work with Sections that appear below the IF function.

In my example the MessageBox "g1o2_unselected" never appear. The compiler returns the warning:
unknown variable/constant "{g1o2}" detected, ignoring (macro:_SectionFlagIsSet:2)

So it appears that this IF only work when it is bellow the dependent section.
Is this a limitation of the SectionIsSelected macro? Is there a workaround?

Any help is appreciated

!include "Sections.nsh"
!include "logiclib.nsh"

;--------------------------------
Name "Section Selected"
OutFile "section_selected.exe"
RequestExecutionLevel user
;--------------------------------
; Pages
Page components
Page instfiles
;--------------------------------
; Sections

Section !Required
  SectionIn RO
SectionEnd

Section "Group 1 - Option 1" g1o1
	
${If} ${SectionIsSelected} ${g1o2}
MessageBox MB_OK g1o2_selected
${Else}
MessageBox MB_OK g1o2_unselected
${EndIf}

SectionEnd


Section /o "Group 1 - Option 2" g1o2
	
${If} ${SectionIsSelected} ${g1o1}
MessageBox MB_OK g1o1_selected
${Else}
MessageBox MB_OK g1o1_unselected
${EndIf}

SectionEnd