button plugin not working for more than one button in MUI NSIS Installer

Question

In GetButtonID function, when more than one button event handler is given,then it autoexits before showing the Directory MUI page dialog. But, when only one button event handler is given, then the Directory page is displayed without any problems.

!include "MUI2.nsh"

!define IDC_BUTTON_CDRIVEPATH 1200
!define IDC_BUTTON_DDRIVEPATH 1201

;---------------------------------------
;Name and file
Name Remove_ERROR
OutFile solve_error.exe
; -------------------------------

!define MUI_ICON "${NSISDIR}\Contrib\Graphics\Icons\setup.ico" ;
!define MUI_HEADERIMAGE
!define MUI_HEADERIMAGE_BITMAP "${NSISDIR}\Contrib\Graphics\Header\icon.bmp" 
!define MUI_WELCOMEFINISHPAGE_BITMAP"${NSISDIR}\Contrib\Graphics\Wizard\img.bmp" 
!define MUI_ABORTWARNING

!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_LICENSE "${NSISDIR}\Docs\Modern UI\licensefile.txt"

!define MUI_PAGE_CUSTOMFUNCTION_SHOW GetButtonID **    <---in this function only one button event handler works, if two handlers are given , then installer crashes**

!insertmacro MUI_PAGE_DIRECTORY

!insertmacro MUI_PAGE_COMPONENTS
!insertmacro MUI_PAGE_INSTFILES
!insertmacro MUI_PAGE_FINISH

Function **CDRIVEPATH**
   MessageBox MB_OK|MB_ICONEXCLAMATION "The Software will be installed in : C Drive"
FunctionEnd

Function **DDRIVEPATH**
   MessageBox MB_OK|MB_ICONEXCLAMATION "The Software will be installed in : D Drive"
FunctionEnd
;--------------------------------

Function **GetButtonID** 

GetFunctionAddress $R2 CDRIVEPATH 
ButtonEvent::AddEventHandler ${IDC_BUTTON_CDRIVEPATH} $R2 

;when this second button handler is given ,then installer autoexits as soon as it has to show the Directory MUI Page dialog:

GetFunctionAddress $R3 DDRIVEPATH 
ButtonEvent::AddEventHandler ${IDC_BUTTON_DDRIVEPATH} $R3

FunctionEnd

;------------------------------------------------------------------
Section "INSTALL MAIN SOFTWARE" 

SetOutPath $INSTDIR

File /r "myfolder\*.*"

SectionEnd
;------------------------------------------------------------------

Answer 1

This behaviour is caused by bug in ButtonEvent.dll plugin. Get new version of this plugin to resolve it.