Function SCIPchgRowExactLhs 

pub unsafe extern "C" fn SCIPchgRowExactLhs(
    scip: *mut SCIP,
    row: *mut SCIP_ROWEXACT,
    lhs: *mut SCIP_RATIONAL,
) -> SCIP_RETCODE

changes left hand side of exact LP row

@return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref SCIP_Retcode “SCIP_RETCODE” for a complete list of error codes.

@pre this method can be called in one of the following stages of the SCIP solving process: - \ref SCIP_STAGE_INITSOLVE - \ref SCIP_STAGE_SOLVING