I didn't get this problem until I installed 1.125 and the new module system and attempted to run the resulting module. I just commented out all the new scene props after headquarters_flag_rebel to get the new module system to work with 1.125.
My brf edit won't work with workshops.brf. It's dated 6/9/2010.
C:\Program Files (x86)\Mount&Blade Warband\Modules\Native\module.ini
This file lists all the brf files the mod will load like "load_resource = workshops". I'm using 1.125 with a module built from the same version and have not had this error. It may be fixed for the next version: http://bugs.taleworlds.com/edit_bug.aspx?id=2713
Oh, I understand mobotium's solution now. There are some files from the 1.125 Native module folder that you need to remember to copy to your module destination folder. Like module.ini. Thanks!