Hi,<br><br>I am following the tutorial <a href="http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/OverlayFeatStatisticalMaps" target="_blank">http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/OverlayFeatStatisticalMaps</a><br>
At this command,<br>
&nbsp;tksurfer bert lh inflated&nbsp;&nbsp; -overlay ./fbert1.feat/stats/zstat1.nii.gz&nbsp;&nbsp; -overlay-reg ./fbert1.feat/reg/freesurfer/anat2exf.register.dat&nbsp;&nbsp; -fthresh 2.3 -fmid 3.3 -fslope 1 -annot aparc.annot<br>tksurfer
runs OK but when I click on any button between &quot;show curvature&quot; and
&quot;draw outlined labels&quot;, it crashes and gives this error:<br>
<br>% alloc: invalid block: 0xbb6c80: 0 0 0<br><br>Here is the section copied from bugr output:<br>---------------------------------------------------------------------<br><br>FREESURFER_HOME: /usr/local/packages/freesurfer<br>

<br>Build stamp: freesurfer-Linux-centos4_x86_64-stable-pub-v4.0.1<br><br>RedHat release: Fedora release 8 (Werewolf)<br><br>Kernel info: Linux 2.6.23.9-85.fc8 x86_64<br><br>---------------------------------------------------------------------<br>

<br>any suggestions how to correct this?<br><br>Thanks,<br><br>George<br><br>