IDA Help: Cannot add the selection to the function definition

This error message means that the selection cannot be added to the function. It may be because of the following:

  - the specified function does not exist or it is not a function entry chunk

  - the selection crosses boundaries of the existing function chunks.
  the selection must not intersect with the existing function chunks
  or must be equal to a function tail chunk.

  - the selection crosses segment boundaries

  - the selection is in a special segment (imports, exports, ...)

  - the selection crosses boundaries of instructions or data

Correct your selection and try again.Index | Previous topic | Next topic