I had forgotten about this one, so I thought I had better post it for others with a similar attention span.

For the benefit of any other member with a Linux AMD64 BOINC platform who gets the error:
"execv: No such file or directory"

For some reason it appears that the BOINC wrapper is still making a 32 bit call during the file save process (eg when writing a results file into a BOINC slots folder)

On a pure 64-bit system the lib-call will fail unless you add the ia32-libs package.

This does not require a reboot.

After installing the ia32-libs package simply resume the Neurona project and, providing you have no other system issues, it should continue on its merry way.

Happy BOINCing. :)