<span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; "><div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; ">I am occasionally and not reproducibly getting this error:</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; "><br></span></div>ERROR: sum weight for constraint 0 is zero</span><div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; "><br>
</span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; ">It is emitted by parmetis. My code passed valgrind reasonably well. Well, the input mesh could be invalid in some way or another of course (even when I do not think so), but then the error should be reproducible, while it is not.</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; ">Does anyone have an idea what can cause it and how to prevent it?</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; ">Many hanks for any hints,</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; background-color: rgb(255, 255, 255); font-size: medium; ">Dominik</span></div>