Issue with MessageBox /SD and goto parameters

[Mircea M]

Hi all,

I'm trying the following:

MessageBox MB_ICONEXCLAMATION|MB_ABORTRETRYIGNORE "Update for Universal C Runtime installation finished with unknown Exit Code $0" /SD IDIGNORE done IDRETRY start

This throws an error:

Usage: MessageBox mode messagebox_text [/SD return] [return_check label_to_goto_if_equal [return_check2 label2]]
mode=modeflag[|modeflag[|modeflag[...]]]
modeflag=(MB_ABORTRETRYIGNORE|MB_OK|
MB_OKCANCEL|MB_RETRYCANCEL|MB_YESNO|
MB_YESNOCANCEL|MB_ICONEXCLAMATION|MB_ICONINFORMATION
|MB_ICONQUESTION|MB_ICONSTOP|MB_USERICON|MB_TOPMOST|
MB_SETFOREGROUND|MB_RIGHT

As soon as I remove "/SD" the script compiles successfully. And idea why?
Thanks,
Mircea