Lookup Table and Lookup Table (2-D) blocks may be replaced by 1-D Lookup Table and 2-D Lookup Table blocks.
You may get a warning that says "A numerical difference might appear" which refers to different methods of determining outputs available to each set of blocks. For example, the older "Use Input Nearest" method will not generally produce the same result as "Linear Interpolation" as the latter interpolates, and the former chooses a value from the table.
I suggest manually selecting the interpolation method that best represents the older interpolation method.
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