VMS Help CC, Messages, RTLMAPNOTFOUND  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        C RTL mapping information for RTL <name> not found.
                Could not access <image_name>.

 Description    In most cases, the Compaq C compiler will
                automatically map names of C standard library
                functions to their corresponding names in the Compaq
                C RTL shareable image.  In many cases, this is done
                simply by adding a "DECC$" prefix to the name.  In
                order for this mapping to work, the compiler accesses
                an RTL mapping table.  This message is issued if the
                compiler was unable to open the mapping table.  In
                these cases, no name mapping will be performed.  The
                most common cause of this message is specifying bad
                name in the /PREFIX=RTL="name" compiler qualifier.

 User Action    Specify a valid RTL on the /PREFIX=RTL qualifier.  If
                no qualifier was used, it might be necessary to
                reinstall the compiler and/or RTL.  For more
                information consult the Compaq C Run-time Library
                Manual for OpenVMS Systems.