1/50 LTCFX   ERR: no per-share table found in the 3 latest
 2/50 DXYZ    ERR: no per-share table found in the 3 latest
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/mnt/Backup/prog/f/fundlab/cef_annual.py", line 462, in <module>
    r = run(args or None)
        ^^^^^^^^^^^^^^^^^
  File "/mnt/Backup/prog/f/fundlab/cef_annual.py", line 426, in run
    a["disc_now_approx"] = round(current_nav_discount(a), 4)
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: type NoneType doesn't define __round__ method