GRC vocoder missing Error

Hello Group;

When I attempt to run a flow graph with any of the “FM Demod” blocks
included I get the following message:

Traceback (most recent call last):

File “/home/bill/top_block.py”, line 9, in

from gnuradio import blks2

File
“/usr/local/lib/python2.6/dist-packages/gnuradio/blks2/init.py”,
line 37, in

exec "from gnuradio.blks2impl.%s import *" % (f,)

File “”, line 1, in

File
“/usr/local/lib/python2.6/dist-packages/gnuradio/blks2impl/cvsd.py”,
line 24, in

from gnuradio.vocoder import cvsd_vocoder

File
“/usr/local/lib/python2.6/dist-packages/gnuradio/vocoder/cvsd_vocoder.py”,
line 6, in

import _cvsd_vocoder

ImportError: libboost_thread-mt.so.1.38.0: cannot open shared object
file:
No such file or directory

It doesn’t seem to be able to find the ‘vocoder’ files. This is odd,
because
I used Marcus’s script to build GRC.

The GRC version is: GNU Radio Companion 3.6.0git-26-gca7903db

Is anyone else having this problem ?

I can probably just add the file, but I don’t know how .

Thanks;

Bill