Getting pyparsing.ParseException while reading .V21 file

[chopinx]

Hi,

I am reading CWR file through this Data-api library. I am getting the following exception. I can send the file case by email if necessary.

Traceback (most recent call last):
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1664, in
main()
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1658, in main
globals = debugger.run(setup['file'], None, None, is_module)
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev\pydevd.py", line 1068, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:\Program Files\JetBrains\PyCharm 2018.2.2\helpers\pydev_pydev_imps_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "D:/python_project/wrc_parser/main.py", line 28, in
data = decoder.decode(data)
File "D:\python_project\wrc_parser\venv\lib\site-packages\cwr\parser\decoder\file.py", line 308, in decode
transmission = self._file_decoder.decode(data['contents'])[0]
File "D:\python_project\wrc_parser\venv\lib\site-packages\cwr\parser\decoder\common.py", line 90, in decode
return self._grammar.parseString(text)
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1632, in parseString
raise exc
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1622, in parseString
loc, tokens = self._parse( instring, 0 )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3398, in parseImpl
loc, exprtokens = e._parse( instring, loc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3381, in parseImpl
loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3381, in parseImpl
loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3381, in parseImpl
loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3398, in parseImpl
loc, exprtokens = e._parse( instring, loc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3548, in parseImpl
raise maxException
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3533, in parseImpl
ret = e._parse( instring, loc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 3398, in parseImpl
loc, exprtokens = e._parse( instring, loc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 1383, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "D:\python_project\wrc_parser\venv\lib\site-packages\pyparsing.py", line 2797, in parseImpl
raise ParseException(instring, loc, self.errmsg, self)
pyparsing.ParseException: Expected {group_trailer_base | group_trailer_short} (at char 322593), (line:2203, col:1)

[chopinx]

the case in tests/example folder can be correctly parsed, but my case failed.

[Bernardo-MG]

Thanks for sharing, but the project is not being developed currently.

[chopinx]

This project is very well designed. But It is difficult for me to understand all the details in a short time. I would like to ask some question if you like.

1. Is there any limit on transaction num in one group？
2. Under what conditions GRT is exoected？

[EricOuma]

@chopinx did you get a solution for the issue?

[dankd123]

Also getting this error unexpectedly. According to the specification, every GRH after the first one must be preceded by a GRT, and a GRT must be followed by a GRH or a TRL.

My file conforms to these requirements.

I tried instead using a fork of this project which made it further into the file, but tripped up at the same error later on.