Dear CEM List,

I am attempting to run cem in Stata MP 14:

cem months (#15) if laac_none_base50p!=., treatment(laac_none_base50p) show

I get the following error:

              cemStata():  3301  subscript invalid

                 <istmt>:     -  function returned error

r(3301);

My data:

479,808 observations

months ranges from 1-156 and is a real number

laac_none_base50p is either 0 (n=1,140) or 1 (n=472,312)

Please help; I can’t find any support for this error.

Andrew