Wondering if I could get some feedback on this error message I received running cem:

. cem strengthpid (1.5 2.5) age (25.5 45.5 64.5) educ (2.5 4.5 6.5) hhinc (3.5 5.5 7.5) male, treatment(indepvote)

Matching Summary:

-----------------

Number of strata: 290

Number of matched strata: 0

             0    1    .

      All  125  860    1

  Matched    0    0    0

Unmatched  125  860    1

             imbalance():  3258  <tmp>[1,1] found where void required

                 <istmt>:     -  function returned error

r(3258);

 Return code 3258

        nonvoid found where void required

        An argument was expected to be void and it is not.

What is this referring to?   

Thanks,

Michael Jones-Correa

Cornell

 

 

 

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