text: Title: BUG: Error when using CyLP
  Body: After finally managing to successfully install CyLP, using it in phase_proc_lp (pyart.correct.phase_proc_lp(radar, 2.0, self_const = 12000.0, low_z=0.0, high_z=53.0, min_phidp=0.01, min_ncp=0.3, min_rhv=0.8, LP_solver='cylp_mp', proc=15)) does not work. The error seems to be 
  "Error in `python': free(): invalid pointer: 0x00005597c77d6c98"
  
  A long list of messages and memory map is being printed out:
  [cylp_messages.txt](https://github.com/ARM-DOE/pyart/files/7589014/cylp_messages.txt) And then the script just hangs.
  
  I installed CyLP following these instructions https://github.com/coin-or/CyLP
  
  I tried also installing CyLP following these instructions provided in the Py-ART documentation https://arm-doe.github.io/pyart/setting_up_an_environment.html but unsuccessfully. I got what looked like compiling issues even after installing additional conda compilers. So the original CyLP installation instructions worked, but for some reason the phase_proc_lp function is not working still.
  
  