Possible issue with dispersion derivative plotting

[jeu8]

Plotting the dispersion derivative does not match with value from "show element" in my wiggler section. Based on the dispersion plot, the plotting seems to be the wrong value. In my lattice this happens in the range 225:230 (plot included). I am not sure if this issue is specific to the wigglers or just where it is most noticeable.
Dispersion_example.zip

[DavidSagan]

I get the error:

ERROR IN bmad_parser: UNABLE TO OPEN FILE: /nfs/acc/user/dcs16/linux_lib/test_unger/R2_50_beta.var
     THIS FROM THE LOGICAL FILE NAME: R2_50_beta.var
      IN FILE: /nfs/acc/user/dcs16/linux_lib/test_unger/g18zd100_R2_50_sext_test.bmad
      AT OR BEFORE LINE: 746

[DavidSagan]

@jeu8 Can you post the needed files?

[jeu8]

Sorry for the wait, here are the files

Dispersion_example_v2.zip