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--></style></head><body lang="NL" link="#0563C1" vlink="#954F72"><div class="WordSection1"><p class="MsoNormal">I’m trying to use the new st_clusterwithin function, but it keeps failing.</p><p class="MsoNormal"> </p><p class="MsoNormal">I’ve tried to cluster 20 points with the following query.</p><p class="MsoNormal"> </p><p class="MsoNormal"> SELECT </p><p class="MsoNormal">                ST_ClusterWithin(geom, 50)</p><p class="MsoNormal"> FROM winkels</p><p class="MsoNormal"> </p><p class="MsoNormal">Most of the times I get the message</p><p class="MsoNormal">“ERROR: Tolerance not defined</p><p class="MsoNormal">SQL state: XX000”</p><p class="MsoNormal">A few times it did work and gave me a result, but trying again will lead to the same error.</p><p class="MsoNormal"> </p><p class="MsoNormal">I’m working with postgis 2.2.2dev (but also tried it with 2.2.0).</p><p class="MsoNormal"> </p><p class="MsoNormal">Anyone has a solution how to solve this?</p><p class="MsoNormal"> </p><p class="MsoNormal" style="mso-margin-top-alt:auto"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#1f497d">Ronnie Lassche</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"></span></p><p class="MsoNormal"> </p></div></body></html>