 --> [ local path prefix ]/param/bad_save_opcode.fpp:3:28
  |
3 |   param P: U32 save opcode "abc"
  |                            ^^^^^ cannot convert expression to integer
  |
  = note: string cannot be converted to Integer

 --> [ local path prefix ]/param/bad_save_opcode.fpp:3:3
  |
3 |   param P: U32 save opcode "abc"
  |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ duplicate opcode value (0 dec, 0 hex)
  |
 ::: [ local path prefix ]/param/bad_save_opcode.fpp:3:3
  |
3 |   param P: U32 save opcode "abc"
  |   ------------------------------ previous occurrence is here

