<div dir="ltr">I write follow code  in  a thread.<br><br>void updateHaptics(void)<br>{ <br>    <br>while(simulationRunning )<br><div>     { <br>   double bounds[6];<br></div><div>   toolactor-&gt;Getbounds(bounds);<br>
</div><div><br>       }<br>simulationRunning=false;<br>      <br>    }<br>    <br>    // exit haptics thread<br>    simulationFinished = true;<br><br>}<br></div><div>beacuse of use from   Getbounds function ,after running ,this is follow error:<br>

</div><div>Error: in VTK\Filtering\vtkExcutive in line 783<br><br></div><br>vtkErrorMacro(&lt;&lt; method &lt;&lt; &quot; invoked during another request.  &quot;<br>                    &quot;Returning failure to algorithm &quot;<br>

                    &lt;&lt; this-&gt;Algorithm-&gt;GetClassName(<div>) &lt;&lt; &quot;(&quot;<br>                    &lt;&lt; this-&gt;Algorithm &lt;&lt; &quot;).&quot;);<br></div></div>