error while loading shared libraries: libsundials_cvode.so.6: cannot open shared object file: No such file or directory

This error message indicates that a required library file called "libsundials_cvode.so.6" cannot be found by the system. This could be due to the library file being missing or not installed properly.

To resolve this issue, you can try the following steps:

1. Check if the library file is present in the correct location. You can use the command "ls /usr/local/lib" to check if the file is present in the /usr/local/lib directory.

2. If the library file is not present, you may need to install it. You can try installing the library using the package manager of your operating system. For example, on Ubuntu, you can use the command "sudo apt-get install libsundials-cvode1" to install the library.

3. If the library file is present but the system is unable to find it, you may need to update the LD_LIBRARY_PATH environment variable to include the directory where the library file is located. You can use the command "export LD_LIBRARY_PATH=/usr/local/lib" to add the /usr/local/lib directory to the LD_LIBRARY_PATH variable.

4. Restart the application to ensure that the changes take effect.