I got this error when linking with uVision version 1.24 (using <2Kb memory model): ERROR L121: IMPROPER FIXUP MODULE: SIO.obj (SIO) SEGMENT: ABSOLUTE OFFSET: 0023H And I fixed the error by disabling "Enable variable overlaying" option in "Linking" tab of "BL51 Code Banking Linker" (Options menu). Could anybody tell me where is this option in the latest version (uVision2 2.30), to fix the same error I have found when upgrading to the new IDE version? Thanks.