Why do I get bad offsets when plotting MACRO modules by byte?

    When plotting MACRO modules by byte, the offset is actually from
    the beginning of the module, including the data psects. You get
    bad offsets because the linker moves the psects around based
    on the psect attributes. Thus, the offsets you get may have no
    relationship to any listing you have. However, if you use PLOT
    ROUTINE foo BY BYTE, then the offsets will be from the beginning
    of the routine. (This will only work if you have an .ENTRY foo
    ... directive in your program.)