Import error in multimode.py

GNU Radio
1

hello all. i am trying to run multimode.py in the GRC. GRC shows the
import error in its flow graph error viewer:

Error 0:
Block - import_0_0_0 - Import(import):
Param - Import(import):
Import “import multimode_helper as mh” failed.

The directory /home/matt/bin contains “multimode_helper.py” and this
file path is in the PYTHONPATH. since i know the correct file path is
in PYTHONPATH and i am still getting the import error i am really
confused here.

Thanks for any help.

Matt