Talk:ModuleNotFoundError

When you start gnuradio-companion or execute grcc, if you get this, or a similar, error message:



then put the following 'export' commands in your  or   or   file and restart your terminal.

= Determine your installation prefix =

If you don't know or remember your installation prefix, perform the following step: then use that prefix in place of  in the following commands
 * on a terminal screen, enter

= Setting PYTHONPATH =

Linux-based systems and MacOSX / macOS
-  For MacOSX / macOS, most Debian / Ubuntu (and derivative) systems, and most other 32-bit Unix/Linux systems, use: export PYTHONPATH={prefix}/lib/python3/dist-packages:{prefix}/lib/python3/site-packages:$PYTHONPATH

-  For other 64-bit systems, use: export PYTHONPATH={prefix}/lib64/python3/site-packages:$PYTHONPATH

= Setting LD_LIBRARY_PATH =

Linux-based systems
-  For most 32-bit systems and most Debian / Ubuntu (and derivative) systems, use: export LD_LIBRARY_PATH={prefix}/lib:$LD_LIBRARY_PATH

-  For other 64-bit systems, use: export LD_LIBRARY_PATH={prefix}/lib64:$LD_LIBRARY_PATH

MacOSX / macOS
On MacOSX / macOS, the library search path is set primarily by the environment variable DYLD_LIBRARY_PATH. Because of the way the OSX dynamic library loader works, this variable works differently than on Linux. Its primary purpose is in finding libraries in a local path, such as when testing software before installing it, or inside an application. We strongly recommend against setting this variable globally.