Or, I should say, it worked when I dropped the missing observations; not the variables. Andrew From: cem-bounces(a)lists.gking.harvard.edu [mailto:cem-bounces@lists.gking.harvard.edu] On Behalf Of Spiegelman, Andrew Sent: Monday, April 27, 2015 9:52 AM To: 'Matt Blackwell'; cem(a)lists.gking.harvard.edu Subject: Re: [cem] [EXTERNAL] Re: Stata cem r(3301) Indeed that does seem to work. Thanks for the help and thanks for great software. Andrew From: Matt Blackwell [mailto:mblackwell@gov.harvard.edu] Sent: Monday, April 27, 2015 9:49 AM To: Spiegelman, Andrew; cem@lists.gking.harvard.edu<mailto:cem@lists.gking.harvard.edu> Subject: [EXTERNAL] Re: [cem] Stata cem r(3301) Hi Andrew, Does CEM work if you remove the "if" statement? If so, you can probably get around this bug by dropping the missing treatment variables before performing the matching. Hope that helps! Cheers, Matt ~~~~~~~~~~~ Matthew Blackwell Assistant Professor of Government Harvard University url: http://www.mattblackwell.org On Mon, Apr 27, 2015 at 9:46 AM Spiegelman, Andrew <Andrew.Spiegelman@va.gov<mailto:Andrew.Spiegelman@va.gov>> wrote: 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 - -- cem Mailing List, served by HUIT Send messages: cem@lists.gking.harvard.edu<mailto:cem@lists.gking.harvard.edu> [un]subscribe Options: http://lists.gking.harvard.edu/?info=cem More information on cem: http://gking.harvard.edu/cem Cem mailing list Cem@lists.gking.harvard.edu<mailto:Cem@lists.gking.harvard.edu> To unsubscribe from this list or get other information: https://lists.gking.harvard.edu/mailman/listinfo/cem