I have had some issues generating pwscf input file with the cif2cell program. The program returned error as follow;
Traceback (most recent call last):
File "/home/usr/.local/bin/cif2cell", line 1574, in
docstring = StandardDocstring()
File "/home/usr/.local/bin/cif2cell", line 1021, in StandardDocstring
tmpstring2 += ". Reference number : "+ref.databasecode
TypeError: cannot concatenate 'str' and 'NoneType' objects
The cif file used is downloaded from materials project database. I understand that the code is finding it difficult to recognize the database used but I do not know how to modify the code to recognize materials project database.
Any help will be highly appreciated.
Thanks in anticipation.
I am not sure if this helps, but your problem doesn't seem to be specific to the cif files generated by Materials project but rather a command line error. The error message TypeError: cannot concatenate 'str' and 'NoneType' objects means that the program can not find the meaning of a command in its dictionary. In this particular case, since the error refers to docstring = StandardDocstring(), it seems that the program can not resolve the output format, requested. In other words , the option you have used for the output format is not defined in the list of available output formats in the version of cif2cell installed on your system. To test this, try another format, for example xyz like this:
cif2cell -p xyz -f your_file.cif
and see if it works. If so, then you may need to update your cif2cell
This is a common error in CIF2Cell. You may find a solution here: https://mattermodeling.stackexchange.com/questions/2478/how-to-resolve-the-cif2cell-typeerror
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