<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Amy,<div> You mean modify the code as follows:</div><div><br></div><div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"># ===========================================================================</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"># Create probe filter</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"># ===========================================================================</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"><br></span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"># Use a probe filter to obtain elevation data from the reconstructed surface</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"><br></span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"># Use a probe filter to obtain elevation data from the reconstructed surface</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;">vtkImageData elevationData</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"> elevationData SetDimensions $XmaxR $YmaxR $ZmaxR</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"><br></span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;">vtkProbeFilter probe </span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"> probe SetInputConnection </span><font class="Apple-style-span" color="#FF0000">0 [elevationData GetProducerPort</font><span class="Apple-style-span" style="font-size: 10px;">]</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"> probe SetSourceConnection [surface GetOutputPort] </span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"><br></span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"><br></span></font></div><div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;">vtkProjectedTerrainPath projectedPaths</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"> projectedPaths SetInput terrainPaths</span></font></div><div><font class="Apple-style-span" face="Monaco" size="2"><span class="Apple-style-span" style="font-size: 10px;"> projectedPaths SetSource [probe GetOutput]</span></font></div><div><br></div><div><br></div><div>I'm getting an application crash when I do this.</div><div><br></div><div>Best regards,</div><div><br></div><div>Elvis </div></div></div><div><br><div><div>On Nov 11, 2008, at 6:18 PM, Amy Squillacote wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>I didn't read the error message closely enough before. The problem is that SetInputConnection is expecting a vtkAlgorithmOutput as its second parameter. Change the parameter from elevationData to [elevationData GetProducerPort].<br><br>- Amy<br><br></div></blockquote></div></div></body></html>