beta.a and beta.b plots disagree with show lat

[MichaelEhrlichman]

test case at ~mpe5/for_dcs/95

See the image below. In the plot, beta_a blows up to ~20 m. However, sho lat reports a beta_a of 10.62 m. Note that the optics from sho lat are correct.

[DavidSagan]

This looks like the lcavity issue that has been reported previously.

[DavidSagan]

@MichaelEhrlichman I was trying to check the plotting and discovered that the lattice no longer is readable. I am getting errors like:

ERROR IN bmad_parser: DEPENDENT ATTRIBUTE NOT FREE TO BE SET: OSC_AMPLITUDE
     FOR: UMAHXH14
      IN FILE: /nfs/acc/user/dcs16/linux_lib/test_unger/test.lat
      AT OR BEFORE LINE: 4012
        B_MAX = 0.823826619676951, OSC_AMPLITUDE = 5.28632058325647E-7, N_PERIOD = 129, L_PERIOD = 0.026,
        DS_STEP = 0.26, field_calc = Planar_Model

Can you fix?