<div dir="ltr">I have had the registration example working, but have't experimented with the filter progress version. Will have a try.</div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 10, 2016 at 11:46 PM, Mathew Guilfoyle <span dir="ltr"><<a href="mailto:mrguilfoyle@gmail.com" target="_blank">mrguilfoyle@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Richard<br>
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Thanks for the reply. I hadn't appreciated that function being passed in the registration example was a closure. However, in the FiterProgressReporting example it is not a closure.<br>
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I have modified my code to be a closure but still get a crash/abort; I have also run the code in the examples themselves verbatim and get the same problem.<br>
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Any further ideas on how to get this working?<br>
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Cheers<br>
<div class="HOEnZb"><div class="h5"><br>
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> On 10 Apr 2016, at 02:10, Mathew Guilfoyle <<a href="mailto:mrguilfoyle@gmail.com">mrguilfoyle@gmail.com</a>> wrote:<br>
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> There seems to be a problem with using the $AddCommand function to ImageRegistrationMethod objects in the R wrapping to SimpleITK.<br>
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> Using R 3.2.4 on OS X 10.11<br>
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> Example:<br>
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> f <- function(x){print(x$GetMetricValue())}<br>
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> registration = ImageRegistrationMethod()<br>
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> registration$AddCommand(‘sitkIterationEvent’, f(registration))<br>
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> This last line causes R to abort/hard crash (no error message). This behaviour is irrespective of which event type I use or the function passed as the second argument (e.g. even something simple like print(‘Hello’))<br>
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> The AddCommand method is inherited from the SimpleITK ProcessObject type. Digging around in the SimpleITK.R file I can see that the ProcessObject$AddCommand method expects a second argument of type ‘_p_itk__simple__Command’.<br>
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> There is a ‘Command’ method that generates a new object of type ‘_p_itk__simple__Command’. If I pass this resulting object as the second argument to registration$AddCommand then I do not get an error. However, there doesn’t seem to be any way to point the ‘_p_itk__simple__Command’ object to my function or otherwise convert my function to a ‘_p_itk__simple__Command’ type.<br>
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> The $AddCommand method is used in a couple of example scripts on the SimpleITK site (using it for monitoring a registration and a filter e.g. <a href="https://github.com/SimpleITK/SimpleITK/blob/master/Examples/FilterProgressReporting.R" rel="noreferrer" target="_blank">https://github.com/SimpleITK/SimpleITK/blob/master/Examples/FilterProgressReporting.R</a>) so I don’t know if it was working previously and a bug has been introduced more recently? (the example scripts cause the same error when I run them now)<br>
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