# Error creating certificates

**URL:** <https://community.blockcerts.org/t/error-creating-certificates/1996>\
**Category:** Technical\
**Created:** [July 1, 2019, 6:06pm UTC](https://community.blockcerts.org/t/error-creating-certificates/1996 "2019-07-01T18:06:55Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mylliswang](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@mylliswang](https://community.blockcerts.org/u/mylliswang)\
**Post date:** [July 1, 2019, 6:06pm UTC](https://community.blockcerts.org/t/error-creating-certificates/1996/1 "2019-07-01T18:06:55Z")

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Hello, I am getting an error when I try to create certificates using cert-tools, I am following the steps:

- git clone [https://github.com/blockchain-certificates/cert-tools.git](https://github.com/blockchain-certificates/cert-tools.git) && cd cert-tools
- pip install .
- create-certificate-template -c conf.ini  
After this step I get the following error:  
Is it a problem with my python version?

Traceback (most recent call last):  
File “c:\python\lib\site-packages\pkg\_resources\__init_\_.py”, line 583, in _build\_master  
ws.require( **requires** )  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 900, in require  
needed = self.resolve(parse\_requirements(requirements))  
File “c:\python\lib\site-packages\pkg\_resources\__init_\_.py”, line 791, in resolve  
raise VersionConflict(dist, req).with\_context(dependent\_req)  
pkg\_resources.ContextualVersionConflict: (jsonschema 3.0.1 (c:\python\lib\site-packages), Requirement.parse(‘jsonschema\<3.0.0,\>=2.5.1’), {‘connexion’})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):  
File “C:\python\Scripts\create-certificate-template-script.py”, line 6, in   
from pkg\_resources import load\_entry\_point  
File “c:\python\lib\site-packages\pkg\_resources\__init_\_.py”, line 3191, in   
@_call\_aside  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 3175, in _call\_aside  
f(\*args, \*\*kwargs)  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 3204, in \_initialize\_master\_working\_set  
working\_set = WorkingSet._build\_master()  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 585, in \_build\_master  
return cls._build\_from\_requirements( **requires** )  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 598, in _build\_from\_requirements  
dists = ws.resolve(reqs, Environment())  
File "c:\python\lib\site-packages\pkg\_resources\_init_.py", line 791, in resolve  
raise VersionConflict(dist, req).with\_context(dependent\_req)  
pkg\_resources.ContextualVersionConflict: (jsonschema 3.0.1 (c:\python\lib\site-packages), Requirement.parse(‘jsonschema\<3.0.0,\>=2.5.1’), {‘connexion’})

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<div class="post-metadata">

**Author:** ![kavibrittov](https://avatars.discourse-cdn.com/v4/letter/k/e274bd/32.png) [@kavibrittov](https://community.blockcerts.org/u/kavibrittov)\
**Post date:** [July 2, 2019, 6:48am UTC](https://community.blockcerts.org/t/error-creating-certificates/1996/2 "2019-07-02T06:48:54Z")

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run

> pip install -r requirements.txt

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<div class="post-metadata">

**Author:** ![mylliswang](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@mylliswang](https://community.blockcerts.org/u/mylliswang)\
**Post date:** [July 2, 2019, 7:09am UTC](https://community.blockcerts.org/t/error-creating-certificates/1996/3 "2019-07-02T07:09:53Z")

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Thanks, but it is still not working, it gives me: “Requirement already satisfied”, but when I try to create the template I get the same previous errors.

Do you think it is a problem with the python environment? I tried to follow this steps: [https://github.com/blockchain-certificates/cert-issuer/blob/master/docs/virtualenv.md](https://github.com/blockchain-certificates/cert-issuer/blob/master/docs/virtualenv.md) but I am not sure if I did it right…

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<div class="post-metadata">

**Author:** ![kavibrittov](https://avatars.discourse-cdn.com/v4/letter/k/e274bd/32.png) [@kavibrittov](https://community.blockcerts.org/u/kavibrittov)\
**Post date:** [July 2, 2019, 7:42am UTC](https://community.blockcerts.org/t/error-creating-certificates/1996/4 "2019-07-02T07:42:17Z")

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initially i’m also facing too many issue. then i create separate venv with python3.7 it works well.

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<div class="post-metadata">

**Author:** ![mylliswang](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@mylliswang](https://community.blockcerts.org/u/mylliswang)\
**Post date:** [July 3, 2019, 5:30am UTC](https://community.blockcerts.org/t/error-creating-certificates/1996/5 "2019-07-03T05:30:48Z")

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Thanks, I created a separate venv and that worked!