# Eigen package error while running tod_detecting

When I run tod_detecting I get the following error;

recognizer: /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/DenseStorage.h:71: Eigen::internal::plain_array<t, size,="" matrixorarrayoptions,="" 16="">::plain_array() [with T = float, int Size = 4, int MatrixOrArrayOptions = 0]: Assertion `(reinterpret_cast<size_t>(array) & 0xf) == 0 && "this assertion is explained here: " "http://eigen.tuxfamily.org/dox/UnalignedArrayAssert.html" " ** * READ THIS WEB PAGE !!! ***"' failed.

When I get a backtrace I see the problem is coming from the point_cloud.h inside the pcl package.

```
#0 0xb7fe1424 in __kernel_vsyscall ()
#1 0xb524c941 in raise () from /lib/libc.so.6
#2 0xb524fe42 in abort () from /lib/libc.so.6
#3 0xb52458e8 in __assert_fail () from /lib/libc.so.6
#4 0xb7f6703d in plain_array (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/DenseStorage.h:71
#5 DenseStorage (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/DenseStorage.h:104
#6 PlainObjectBase (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/PlainObjectBase.h:354
#7 Matrix (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/Matrix.h:272
#8 Quaternion (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Geometry/Quaternion.h:252
#9 Identity (this=0x8148de8) at /opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Geometry/Quaternion.h:109
#10 PointCloud (this=0x8148de8) at /opt/ros/diamondback/stacks/perception_pcl/pcl/include/pcl/point_cloud.h:84
#11 tod::TexturedObject::TexturedObject (this=0x8148de8) at /host/Desktop/Thesis/ros/repository/object_recognition/tod/src/core/TexturedObject.cpp:18
#12 0xb5551ca0 in tod::Loader::readTexturedObjects(std::vector<cv::Ptr<tod::TexturedObject>, std::allocator<cv::Ptr<tod::TexturedObject> > >&) ()
from /host/ros/repository/object_recognition/tod_detecting/lib/libtod_detecting.so
#13 0x0805f7cf in ?? ()
#14 0xb5238ce7 in __libc_start_main () from /lib/libc.so.6
#15 0x0805d001 in ?? ()
```

I visited the web page http://eigen.tuxfamily.org/dox/Unalig... but i didn't understand what is causing this error.

Does anyone know how to cope with it?

Best regards..