<div dir="ltr">Hi Dorian,<div><br></div><div>Generally this issue will crop up for one of three reasons:</div><div><ul><li>Memory leak in the Windows version of MRtrix. There seems to be an unusual problem when streamtrack is compiled for Windows where the memory used by previously generated streamlines is not properly freed, and the program therefore crashes when it consumes all of your system's RAM. But even if this is not the problem, running the Linux version inside a virtual machine can be considerably faster, and MRtrix was built as a Linux package, so this is our preference.</li>
<li>Use of a 32-bit operating system. The OS can no longer refer to the correct offset in the file, and therefore can't write to the file correctly. The issue will arise as soon as the file size hits 2GB or 4GB (probably the former). My understanding is that there is not yet a working 64-bit Windows MRtrix compilation, so the Windows version will encounter this limit regardless of the version of Windows being used. Again, a 64-bit Linux running inside a virtual machine is preferable, though I'm not sure whether you will get access to > 3.25GB of RAM in the virtual machine if your Windows install is natively 32-bit (someone else may be able to answer this question).</li>
<li>Use of a 32-bit file system such as FAT32 on your target hard disk drive. This is particularly common when users try to write their .tck files to an external hard drive.</li></ul><div>As to why your system could not open the successful .tck file, it's difficult to know without more information. But the first step is to make sure that your system isn't running out of RAM when loading the file.</div>
</div><div><br></div><div>For conversion from .tck to .trk, I don't know of any other tools, though I do vaguely recall writing a command to convert the other way... so it can't be too difficult, and somebody on here may already have an appropriate program.</div>
<div><br></div><div>Best regards</div><div>Rob</div></div><div class="gmail_extra"><br clear="all"><div><br>--<br><br><span style="color:rgb(255,102,0)"><b>Robert Smith</b><br>Post-Doctoral Researcher, Imaging Division</span><br>
<br>The Florey Institute of Neuroscience and Mental Health<br>Melbourne Brain Centre - Austin Campus<br>245 Burgundy Street<br>Heidelberg Vic 3084<br>Ph: +61 3 9035 7128<br>Fax: +61 3 9035 7301<br><a href="http://www.florey.edu.au" target="_blank">www.florey.edu.au</a><br>
<span style="font-size:9pt;font-family:"Times New Roman","serif";color:red"></span></div>
<br><br><div class="gmail_quote">On Fri, Dec 6, 2013 at 4:47 AM, Dorian P. <span dir="ltr"><<a href="mailto:alb.net@gmail.com" target="_blank">alb.net@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">Hello Donald and other mtrixers,</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
I am using regularly MRtrix in windows without any trouble. The only thing that seem to be limited is the number of fibers. I tried to get 1 million fibers and it crashed:</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
540742 generated, 518411 selected [ 51%]streamtrack: error writing to tracks file: Invalid argument</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
File was about 2GB. I ran it again with 450,000 fibers and it worked. However, mrview cannot open the .tck file.</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
What is the limit of fiber number in the Windows version? Is it better in Linux?</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
Also, is there a way to convert .tck to TrackVis .trk file? I found a python script but needs installation of all sorts of addons that my computer is not liking.</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
<br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">Thank you.</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
Dorian</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">TJU</div></div>
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