... This should be one of the frames supported by the SPICELIB routine NAMFRM which is an entry point of FRAMEX. ... Exceptions 1) If handle is not the handle of a C-kernel opened for writing the error will be diagnosed by routines called by this routine. 2) If segid is more than 40 characters long, the error SPICE(SEGIDTOOLONG) is signalled. ... 7) If the name of the reference frame is not one of those supported by the SPICELIB routine NAMFRM, the error SPICE(INVALIDREFFRAME) is signalled. ...