# Failed to create xml files **URL:** \ **Category:** GNU Radio\ **Created:** [August 10, 2014, 8:07pm UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480 "2014-08-10T20:07:59Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [August 10, 2014, 8:07pm UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480/1 "2014-08-10T20:07:59Z")
Hi all, I am building an OOT module. When I run gr\_modtool makexml beacon\_gen, I got error: GNU Radio module name identified: PNC Warning: This is an experimental feature. Don’t expect any magic. Searching for matching files in lib/: Making GRC bindings for lib/beacon\_gen\_impl.cc… Traceback (most recent call last): File “/usr/local/bin/gr\_modtool”, line 47, in main() File “/usr/local/bin/gr\_modtool”, line 39, in main modtool.run() File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/modtool\_makexml.py”, line 66, in run (params, iosig, blockname) = self.\_parse\_cc\_h(f) File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/modtool\_makexml.py”, line 165, in \_parse\_cc\_h return (parser.read\_params(), parser.read\_io\_signature(), blockname) File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/parser\_cc\_block.py”, line 82, in read\_io\_signature iosig\_match.group(‘intype’)) File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/parser\_cc\_block.py”, line 47, in \_figure\_out\_iotype\_and\_vlen return {‘type’: [\_typestr\_to\_iotype(x) for x in typestr.split(’,’)], File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/parser\_cc\_block.py”, line 55, in \_typestr\_to\_iotype return self.type\_trans(type\_match.group(1)) File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/gnuradio/modtool/modtool\_makexml.py”, line 140, in \_type\_translate if p\_type in (‘int’,) and default\_v[:2].lower() == ‘0x’: TypeError: ‘NoneType’ object has no attribute ‘ **getitem** ’ Can anyone help me with this? Thank you, Ly Van-Ly Nguyen, Signals and Systems Laboratory - SSL Faculty of Electronics and Telecommunications - FET University of Engineering and Technology - UET Vietnam National University, Hanoi - VNU Tel: (+84) 978 819 406 ---
**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\ **Post date:** [August 10, 2014, 8:34pm UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480/2 "2014-08-10T20:34:47Z")
On 10.08.2014 20:06, Nguyễn Văn Lý wrote: > Hi all, > > I am building an OOT module. When I run gr\_modtool makexml beacon\_gen, I > got error: > GNU Radio module name identified: PNC > Warning: This is an experimental feature. Don’t expect any magic. Well, it does warn you about being experimental. > Searching for matching files in lib/: > Making GRC bindings for lib/beacon\_gen\_impl.cc… > Traceback (most recent call last): > […] > Can anyone help me with this? If you post the module somewhere, I can take a look. Don’t expect an immediate fix, though. In the meantime, I suggest you write the XML by hand. Cheers, Martin ---
**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\ **Post date:** [August 11, 2014, 6:11am UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480/3 "2014-08-11T06:11:04Z")
Hi Martin, I wrote the XML files by hand as you suggested, but when I run a grc file to test the blocks, there’s another error that I don’t know. _Traceback (most recent call last): File “/home/van-ly/sandbox/gnuradio-builds/Test/top\_block.py”, line 18, in import PNC File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC/ **init**.py”, line 45, in from PNC\_swig import \* File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC/PNC\_swig.py”, line 28, in \_PNC\_swig = swig\_import\_helper() File “/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC/PNC\_swig.py”, line 24, in swig\_import\_helper \_mod = imp.load\_module(‘\_PNC\_swig’, fp, pathname, description)ImportError: /opt/gnuradio-3.7.3/lib/libgnuradio-PNC.so: undefined symbol: \_ZN2gr3PNC18sync\_end\_node\_impl17shift\_window\_funcESt6vectorISt7complexIfESaIS4\_EES4\_i_ You can see my module and my grc test file in the enclosed files. Thank you very much, Ly Van-Ly Nguyen, Signals and Systems Laboratory - SSL Faculty of Electronics and Telecommunications - FET University of Engineering and Technology - UET Vietnam National University, Hanoi - VNU Tel: (+84) 978 819 406 On Mon, Aug 11, 2014 at 1:33 AM, Martin B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/9fc29f/32.png) [@NguySSSn\_VSSn\_LS\_S](https://www.ruby-forum.com/u/NguySSSn_VSSn_LS_S)\ **Post date:** [August 13, 2014, 12:07pm UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480/4 "2014-08-13T12:07:55Z")
Maybe a SWIG issue (needs cleaning and recompiling), or a virtual function not declared pure virtual… this can be anything, and you’ll need to do the usual C++ debugging steps to figure this out. Good luck, M