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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">I have a DM MPI Vec u, I want to scatter it to a sequential Vec w in processor 0. There is a function <span style="font-family: Menlo; font-size: 11px;">VecScatterCreateToZero </span><span style="font-size: 10pt;">allowing
me to do that. However, the global indices get easily messed up if I do this way. </span>
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<div><span style="font-size: 10pt;">So I have to match the IS for u and w. And I think maybe I can use </span><span style="font-family: Menlo; font-size: 11px;">DMCompositeGetGlobalISs </span><span style="font-size: 10pt;">to get the IS, and then call </span><span style="font-family: Menlo; font-size: 11px;">VecScatterCreate(u,is[</span><span style="font-family: Menlo; font-size: 11px; color: rgb(39, 42, 216);">0</span><span style="font-family: Menlo; font-size: 11px;">],w,is[</span><span style="font-family: Menlo; font-size: 11px; color: rgb(39, 42, 216);">0</span><span style="font-family: Menlo; font-size: 11px;">],&ctx). </span></div>
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<div>But I'm not sure if I'm doing the right thing, and for now it gives me segmentation fault, memory errors on <span style="font-family: Menlo; font-size: 11px;">DMCompositeGetGlobalISs. </span></div>
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<div><span style="font-size: 10pt;">So I need some help on this. </span></div>
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