<div dir="ltr"><div dir="ltr">María Teresa and list;</div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, May 14, 2026 at 11:49 AM Maria Teresa Vega via QGIS-User <<a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN">Good afternoon,
I'm working with pgRouting and I'm getting the following error: "the
function pgr_createtopology does not exist".</span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN">I have executed
the following sentence:</span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN-US">alter table
calles add column source integer;</span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN-US">alter table
calles add column target integer;</span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN-US">select
pgr_createTopology('calles', 0.0001, 'geom', 'id');</span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN-US"> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN"> </span><span lang="EN-US">Can anyone please help me?</span></p><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:115%;font-size:12pt;font-family:Calibri,sans-serif"><span lang="EN-US"><br></span></p></div></div></blockquote><div>I don't know if this is helpful or not, but I see that pgr_createTolology has been deprecated as of version 3.8, which is itself no longer supported.</div><div><br></div><div><a href="https://github.com/pgRouting/pgrouting/issues/2750">https://github.com/pgRouting/pgrouting/issues/2750</a></div><div><br></div><div> I wonder if you have looked at the documentation here</div><div><br></div><div><a href="https://docs.pgrouting.org/latest/es/pgRouting-concepts.html#create-a-routing-database">https://docs.pgrouting.org/latest/es/pgRouting-concepts.html#create-a-routing-database</a></div><div><br></div><div>for instructions on creating topology?</div></div><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Chris Hermansen · clhermansen "at" gmail "dot" com<br><br>C'est ma façon de parler.</div></div></div>