[seL4] Capabilities of binary images

Hi, I need to access the user image from a user application for verifying that the binary is installed correctly. So I found in bootinfo.h that it contains userImageFrames and its supposed to be the one I'm looking for but it gave me an error when I map the frames via vspace_map_pages(vspace, info->userImageFrames.start, ...) at the root task. The error is : ERROR:sel4utils_map_page_pd:223: Error mapping pages, bailing: 2 What am I doing wrong here? Best, Oak -- Norrathep (Oak) Rattanavipanon M.S. in Computer Science University of California - Irvine