problem porting OOT to gr_3.9 : gr_modtool bind error

[Tom McDermott]

I am having difficulty porting an OOT module to gr 3.9.

* VM with only gnuradio 3.9.0.0 installed.

*The functional 3.8 OOT module is cloned into this VM.

Installed is 3.9.0.0

Python 3.8.5

pygccxml 2.1.0

pybind11 2.6.2

*  Created the gr-hpsdr_3.9  directory, populated it using gr_modtool newmod, added the

two modules hermesNB and hermesWB with constructor parameters.

In the 3.8 directory:

 hermesNB.h and hermesWB.h  both exist in the /include directory, and

 hermesWB_impl.cc and hermesNB_impl.cc both  exist in the /lib directory

 Edited the ./python/Cmakelists.txt file to add the bindings subdirectory.

 From the directory gr-hpsdr_3.8/gr-hpsdr, I execute gr_modtool bind

 It prompts for the block name. I used the base module name without any suffixes:

hermesNB

(also tried  hermesNB.h, hermesNB_impl.cc, hermesWB, hermewWB.h, hermesWB_impl.cc)

I always get the following error message:

tom@tom-Standard-PC-Q35-ICH9-2009:~/gr-hpsdr_3.8/gr-hpsdr$ gr_modtool bind
GNU Radio module name identified: hpsdr
Which blocks do you want to parse? (Regex): hermesNB
/usr/lib/python3/dist-packages/apport/report.py:13: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import fnmatch, glob, traceback, errno, sys, atexit, locale, imp, stat
Traceback (most recent call last):
  File "/usr/bin/gr_modtool", line 18, in <module>
    cli()
  File "/usr/lib/python3/dist-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3/dist-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3/dist-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3/dist-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gnuradio/modtool/cli/base.py", line 133, in wrapper
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gnuradio/modtool/cli/bind.py", line 46, in cli
    run(self)
  File "/usr/lib/python3/dist-packages/gnuradio/modtool/cli/base.py", line 152, in run
    module.run()
  File "/usr/lib/python3/dist-packages/gnuradio/modtool/core/bind.py", line 61, in run
    file_to_process = os.path.join(self.dir, self.info['includedir'], self.info['blockname'] + '.h')
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

Thus am stuck at this time.    Is there a new or revised gr_modtool ?

-- Tom, N5EG