topic Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? in SAS Programming https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937372#M368321 Try change your PROC MI code, use other imputed method like FCS , MONOTINC,LOGISTIC ......... to make variable have different value. Sun, 28 Jul 2024 06:07:14 GMT Ksharp 2024-07-28T06:07:14Z how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937362#M368313 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="dsam_0-1722121321843.png" style="width: 400px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/98763i12C9530F4CB4CB6B/image-size/medium?v=v2&amp;px=400" role="button" title="dsam_0-1722121321843.png" alt="dsam_0-1722121321843.png" /></span></P><P>&nbsp;</P> Sat, 27 Jul 2024 23:02:52 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937362#M368313 dsam 2024-07-27T23:02:52Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937365#M368315 That means variable '_bin_' have the same value in all the obs (under that special BY group). Sun, 28 Jul 2024 01:43:41 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937365#M368315 Ksharp 2024-07-28T01:43:41Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937367#M368317 <P>How can i resolve this issue?</P> Sun, 28 Jul 2024 02:18:59 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937367#M368317 dsam 2024-07-28T02:18:59Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937368#M368318 Make your variable '_bin_' have different values ,otherwise it is nonsense for PROC MIANAZE or PROC MI . Sun, 28 Jul 2024 03:21:38 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937368#M368318 Ksharp 2024-07-28T03:21:38Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937369#M368319 How can I make it different value ? the problem is code is working fine generating different values for all other visits but only for one visit, it is generating same values. How can i obtain different values for this particular value?<BR /> Sun, 28 Jul 2024 04:30:41 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937369#M368319 dsam 2024-07-28T04:30:41Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937370#M368320 <P><SPAN><SPAN class="">Below is the code i used to generate _bin_ values which is generating same value for a one specific visit. </SPAN></SPAN></P><P>&nbsp;</P><P>&nbsp;</P><P><SPAN><SPAN class="">proc freq data= adeffimp01 ;<BR />   &nbsp;&nbsp; by _imputation_ &amp;trt. &amp;trt.n avisitn avisit;<BR />    tables aval/ binomial;<BR />    exact binomial;<BR />    output out = i_bin bin;<BR />  run;&nbsp;</SPAN></SPAN></P> Sun, 28 Jul 2024 05:09:21 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937370#M368320 dsam 2024-07-28T05:09:21Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937372#M368321 Try change your PROC MI code, use other imputed method like FCS , MONOTINC,LOGISTIC ......... to make variable have different value. Sun, 28 Jul 2024 06:07:14 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937372#M368321 Ksharp 2024-07-28T06:07:14Z Re: how to resolve proc Mi warning: Between -imputation variance is zero for variable ? https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937373#M368322 And I think you should use only one BY :<BR />by _imputation_ &amp;trt. &amp;trt.n avisitn avisit;<BR />--&gt;<BR />by _imputation_ ;<BR />since it presents the imputing ID .<BR /><BR />Otherwise, you should include all these variables in BY statement of PROC MI . Sun, 28 Jul 2024 06:11:15 GMT https://communities.sas.com/t5/SAS-Programming/how-to-resolve-proc-Mi-warning-Between-imputation-variance-is/m-p/937373#M368322 Ksharp 2024-07-28T06:11:15Z