It is possible this shared library is missing from your system or it is not on the path or there is a mismatch in the name of the shared library that the installer expects and the actual name in your Linux distribution.
Run the following command in your Terminal at the root directory of your system. This will find any "libidn" shared object in your system and list them.
find /usr -name "*libidn*" -print
libidn.so.11 is listed
This is if you find the library listed in the /usr/lib64/ folder.
The following are two reasons to explain this issue:
1. It is not on your system path -
Run the following command to add the library path to the "LD_LIBRARY_PATH" environment variable.
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/your/library/path/ sudo ldconfig
Replace /your/library/path with the path to the shared library
2. The filenames of the installed system libraries do not quite match up with what the compiled application installer is expecting for libidn.so.11 on the host system.
The following commands create an install directory, copy your RoadRunner installer and then link to the libidn.so.11 library. These commands should be run from this directory /usr/Local/RoadRunner R2022a/bin/glnxa64
$ mkdir /tmp/my_install
$ cp ./AppRoadRunner /tmp/my_install
$ cd /tmp/my_install
$ ln -s /your/library/path/ libidn.so.11
$ ./AppRoadRunner
To make these changes accessible from anywhere, create the equivalent symbolic links within the /usr/lib64 directory.
libidn.so.11 is not listed
Install the 64 bit version of the libidn.so.11 library. Then follow Step 1 above after obtaining the library path. If the error still persists, follow Step 2 above.
