Dear Folks –

Joshua kindly replied:
>Yes, using ? in UWPs and PBGs for unknown stats is supported. If
size/atm/hyd are ??? you'll get the * glyph.

I’m obviously doing something wrong. I’ve entered three versions (to see if
any of the combinations worked; the first line is to show that the “normal”
entry passes with a warning):

B0102      0902 X7B4000-0        Tp               011 Na
B0109      0909 X???000-0                        ??? 
B0109      0909 X???000-0                           
B0109      0909 X??????-?                        ???   

And get the following:

Hint: Parsing as: SEC (Legacy)
Error: SEC Parse, line 2: B0109      0909 X???000-0
??? 
Error: SEC Parse, line 3: B0109      0909 X???000-0

Error: SEC Parse, line 4: B0109      0909 X??????-?
??? 
3 errors, 2 warnings.

Can you tell me what I’m doing wrong?