[ITK] [ITK-users] Exception when running IO example ImageReadCastWrite in Xcode

[Tim Allman]

Matt,

This is the issue I asked about earlier and I'm still confused about it. 
Your suggestion to add

     itk::NrrdImageIOFactory::RegisterOneFactory();

solved my problem (thank you) but I have written code to read and write 
images on the iMac before and have never had to do this. In those cases 
I just wrote Makefiles to do the build and the ImageIO instances were 
created automatically.

What is happening here? Is the result of using CMake/Xcode different 
from using CMake/Makefiles or hand written Makefiles?

Thanks,
Tim

On 14-03-28 11:04 AM, Matt McCormick wrote:
> Hi,
>
> Use CMake to generate the XCode project for the HelloWorld or
> ImageReadCastWrite, and it will automatically generate all the
> factories.
>
> Hope this helps,
> Matt
>
> On Fri, Mar 28, 2014 at 9:44 AM, padillr <ramonpadilla1 at yahoo.co.uk> wrote:
>> Hi,
>>
>> I have successfully built ITK version 4.5.1 on OS X using cmake.
>>
>> The following are options that I'm passing to cmake.
>>
>> -DCMAKE_BUILD_TYPE=Debug \
>> -DCMAKE_C_COMPILER=clang \
>> -DCMAKE_CXX_COMPILER=clang++ \
>> -DITK_USE_64BITS_IDS=Yes \
>> -DCMAKE_CXX_FLAGS="-std=c++11 -stdlib=libc++" \
>> -DITK_DIR=/temp/itk/build/
>>
>> I then created an Xcode project, imported the Hello World example, set up
>> paths to the headers and linked to the ITK libraries that I built previously
>> using cmake. The example built and ran successfully.
>>
>> Next, I tried to do the same with the ImageReadCastWrite example in IO. This
>> also builds successfully but when I run it I get the following exception.
>>
>> ExceptionObject caught !
>>
>> itk::ImageFileWriterException (0x100304788)
>> Location: "virtual void itk::ImageFileWriter<itk::Image<unsigned char, 2>
>>> ::Write() [TInputImage = itk::Image<unsigned char, 2>]"
>> File: /temp/itk/Modules/IO/ImageBase/include/itkImageFileWriter.hxx
>> Line: 151
>> Description:  Could not create IO object for file
>> /temp/itk-sample/T1_MAP.png
>>    Tried to create one of the following:
>>    You probably failed to set a file suffix, or
>>      set the suffix to an unsupported type.
>>
>> I'm using ITK for the first time. A quick investigation suggests that there
>> are no factories being loaded. Any ideas why this may be the case?
>>
>> Please note that I can successfully execute ImageReadCastWrite in the bin
>> directory that was created as part of building ITK.
>>
>>
>>
>>
>>
>>
>>
>> --
>> View this message in context: http://itk-insight-users.2283740.n2.nabble.com/Exception-when-running-IO-example-ImageReadCastWrite-in-Xcode-tp7585270.html
>> Sent from the ITK Insight Users mailing list archive at Nabble.com.
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-- 
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada

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