The following limitations have been observed while using OpenCOR on our supported platforms. They may apply to you, or not, depending on the platform you use and your specific circumstances.
Windows, Linux and OS X
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By default, OpenCOR uses your system's language for menus, dialog boxes, etc., as long as it is either English or French (please contact us if you would like OpenCOR to support other languages). If your system uses another language, then OpenCOR will default to English. Otherwise, if you specifically specify English or French, then please be aware that system messages, dialog boxes, etc. will still be displayed using your system's language (assuming it is not one of the languages supported by OpenCOR).
Windows
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OpenCOR's File Browser plugin may, on some systems, result in OpenCOR being slow to respond at startup. This has nothing to do with OpenCOR, but with Windows or, more precisely, a program which tightly integrates with its shell. There are several known causes and solutions to this problem. However, should none of them work for you, then you might have to unselect the plugin.
Linux
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If you run Linux as a virtual machine within VirtualBox, then please be aware that there are known issues with 3D support (e.g. see https://www.virtualbox.org/ticket/6848). Now, it happens that OpenCOR needs 3D support, so to get it to work in your virtual machine, indirect rendering might have to be used and this can be done either every time you want to run OpenCOR:
$ LIBGL_ALWAYS_INDIRECT=1 ./OpenCOR
or once and for all by exporting LIBGL_ALWAYS_INDIRECT
(e.g. in your ~/.bashrc
file):
export LIBGL_ALWAYS_INDIRECT=1
Note: to disable 3D hardware acceleration in your virtual machine is not enough.