Got this error message, and tried the fix from the prior thread but still having problems.  I get the same message no matter what list of covariates I use, or even if I switch the treatment variable.

. cem totpop_07 netinc_07 disvlg_n distroad_n age edu male ccp prov (#0) if sumindexnew2 ~=., t
> reatment(sumindexnew2)

Matching Summary:
-----------------
Number of strata: 1650
Number of matched strata: 0

             0     1     .
     All  1315   668    42
 Matched     0     0     0
Unmatched  1315   668    42

            imbalance():  3258  <tmp>[1,1] found where void required
                <istmt>:     -  function returned error
r(3258);


Any suggestions?

Many thanks

Lily Tsai-
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