Hi everyone !<br><br>I try to use this pgdijkstra on my data with :<br><br><span style="font-weight: bold;">SELECT arc_num_nod_src as "source",arc_num as "id",arc_num_nod_des as "target",arc_cost as "cost" FROM TAB_ARC;
</span><br><br>source id target cost<br>0 6259 4769 0<br>4769 6260 4770 0<br>4770 6261 4771 0<br>4771 6262 4772 0<br>4772 6263 4773 0<br>0 6264 4775 0
<br>4775 6265 4776 0<br>4776 6266 4777 0<br>4777 6267 4778 0<br>4778 6268 4779 0<br>4779 6269 4780 0<br>4780 6270 4781 0<br>0 6271 4783 0<br>4783 6272 4784 0
<br>4784 6273 4785 0<br>4785 6274 4786 0<br>4786 6275 4787 0<br>4787 6276 4788 0<br>4788 6277 4789 0<br>4789 6278 4790 0<br>0 6279 4792 0<br>4792 6280 4793 0
<br><br>But when I try this one :<br><br><span style="font-weight: bold;">select * from shortest_path('SELECT arc_num_nod_src as "source",arc_num as "id",arc_num_nod_des as "target",arc_cost as "cost" FROM TAB_ARC',4769,4770,false,false);
</span><br><br>I become this message :<br><br>ERROR: Error computing path: Source vertex not found<br><br>Can someone help me ??<br><br>