# Error when running RemoteView example with Paraview pv\_server.py

**URL:** https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104
**Category:** ParaView Support
**Created:** [December 21, 2020, 1:28pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104 "2020-12-21T13:28:33Z")
**Posts on this page:** 7
**Page:** 1

<div class="post-metadata">

### Author: ![Charliebrowne](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/c/d26b3c/32.png) [@Charliebrowne](https://discourse.paraview.org/u/Charliebrowne)
#### Post date: [December 21, 2020, 1:28pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/1 "2020-12-21T13:28:33Z")

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Hi there I tried to run the default RemoteView live example but it fails when launching the server script (using Paraview as a backend 2nd script [on this example page](https://kitware.github.io/vtk-js/examples/RemoteView.html)) -  
Running ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit on Windows 10 32GB Ram & NVIDIA GeForce GTX 670.  
any clue ? I couldnt find any reference to this error type anywhere  
Thanks a lot  
Charlie  
Here is the error thrown on server side :  
D:\Work\VTKViewer\>pvpython pv\_server.py --port 1234  
( 1.507s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device  
( 1.507s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device  
( 1.518s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device  
[…]  
wslink: Starting factory  
Temporarily disabling observer LegacyLogObserverWrapper(\<bound method PythonLoggingObserver.emit of \<twisted.python.log.PythonLoggingObserver object at 0x0000029F88568400\>\>) due to exception: [Failure instance: Traceback: \<class ‘TypeError’\>: _findCaller() takes from 1 to 2 positional arguments but 3 were given  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\wslink\server.py:30:print\_ready  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\threadable.py:53:sync  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py:286:msg  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:154:publishToNewObserver  
— —  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_observer.py:131: **call**  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:93: **call**  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py:595:emit  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:154:publishToNewObserver  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_stdlib.py:115: **call**  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\_init_.py:1500:log  
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\__init_\_.py:1565:\_log  
]  
Traceback (most recent call last):  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\wslink\server.py”, line 30, in print\_ready  
log.msg(“wslink: Starting factory”, logLevel=logging.CRITICAL)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\threadable.py”, line 53, in sync  
return function(self, \*args, \*\*kwargs)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py”, line 286, in msg  
\_publishNew(self.\_publishPublisher, actualEventDict, textFromEventDict)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py”, line 154, in publishToNewObserver  
observer(eventDict)  
— —  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_observer.py”, line 131, in **call**  
observer(event)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py”, line 93, in **call**  
self.legacyObserver(event)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py”, line 595, in emit  
\_publishNew(self._newObserver, eventDict, textFromEventDict)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py”, line 154, in publishToNewObserver  
observer(eventDict)  
File “C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_stdlib.py”, line 115, in **call**  
self.logger.log(  
File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\_init_.py", line 1500, in log  
self._log(level, msg, args, \*\*kwargs)  
File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\_init_.py", line 1565, in \_log  
fn, lno, func, sinfo = self.findCaller(stack\_info, stacklevel)  
builtins.TypeError: \_findCaller() takes from 1 to 2 positional arguments but 3 were given

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<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [December 21, 2020, 6:14pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/2 "2020-12-21T18:14:08Z")

</div>

Does [Visualizer](https://kitware.github.io/visualizer/docs/#Run-it-from-ParaView) fail the same way with your ParaView bundle?

---

<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [December 21, 2020, 6:17pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/3 "2020-12-21T18:17:58Z")

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It looks like the latest twisted logger has a different API. Since the error seems to come from that [line](https://github.com/Kitware/wslink/blob/master/python/src/wslink/server.py#L30)

You should try with ParaView 5.8

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<div class="post-metadata">

### Author: ![Charliebrowne](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/c/d26b3c/32.png) [@Charliebrowne](https://discourse.paraview.org/u/Charliebrowne)
#### Post date: [December 21, 2020, 9:34pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/4 "2020-12-21T21:34:37Z")

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Hi, same story with Visualizer, please below:

```
c:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit>.\bin\pvpython.exe share\paraview-5.9\web\visualizer\server\pvw-visualizer.py --content share\paraview-5.9\web\visualizer\www\ --data "D:\xx\VTKViewer\data" --port 8080 "
( 1.584s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device
( 1.585s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device
...
   2.123s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device
( 2.126s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device
( 2.126s) [paraview] VisRTXBackend.cxx:42 WARN| VisRTX Error: Unsupported device
wslink: Starting factory
Temporarily disabling observer LegacyLogObserverWrapper(<bound method PythonLoggingObserver.emit of <twisted.python.log.PythonLoggingObserver object at 0x00000239B4ECE280>>) due to exception: [Failure instance: Traceback: <class 'TypeError'>: _findCaller() takes from 1 to 2 positional arguments but 3 were given
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\wslink\server.py:30:print_ready
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\threadable.py:53:sync
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py:286:msg
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:154:publishToNewObserver
--- <exception caught here> ---
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_observer.py:131: __call__
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:93: __call__
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py:595:emit
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py:154:publishToNewObserver
C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_stdlib.py:115: __call__
c:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\ __init__.py:1500:log
c:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\ __init__.py:1565:_log
]
Traceback (most recent call last):
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\wslink\server.py", line 30, in print_ready
    log.msg("wslink: Starting factory", logLevel=logging.CRITICAL)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\threadable.py", line 53, in sync
    return function(self, *args, **kwargs)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py", line 286, in msg
    _publishNew(self._publishPublisher, actualEventDict, textFromEventDict)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py", line 154, in publishToNewObserver
    observer(eventDict)
--- <exception caught here> ---
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_observer.py", line 131, in __call__
    observer(event)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py", line 93, in __call__
    self.legacyObserver(event)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\python\log.py", line 595, in emit
    _publishNew(self._newObserver, eventDict, textFromEventDict)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_legacy.py", line 154, in publishToNewObserver
    observer(eventDict)
  File "C:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\Lib\site-packages\twisted\logger\_stdlib.py", line 115, in __call__
    self.logger.log(
  File "c:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\ __init__.py", line 1500, in log
    self._log(level, msg, args, **kwargs)
  File "c:\Program Files\ParaView 5.9.0-RC1-MPI-Windows-Python3.8-msvc2017-64bit\bin\lib\logging\ __init__.py", line 1565, in _log
    fn, lno, func, sinfo = self.findCaller(stack_info, stacklevel)
builtins.TypeError: _findCaller() takes from 1 to 2 positional arguments but 3 were given
```

---

<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [December 22, 2020, 5:27pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/5 "2020-12-22T17:27:16Z")

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Try to edit the python code by passing `disableLogging=True` to the [start\_server](https://github.com/Kitware/visualizer/blob/master/server/pvw-visualizer.py#L243) call.

---

<div class="post-metadata">

### Author: ![Charliebrowne](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/c/d26b3c/32.png) [@Charliebrowne](https://discourse.paraview.org/u/Charliebrowne)
#### Post date: [December 27, 2020, 5:57pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/6 "2020-12-27T17:57:35Z")

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Hi Sébastien,

yes the `disableLogging=True` workaround did the trick with PV 5.9.0 RC1 (at least no more errors in window at server launch) - Though I have not tested functionally yet, thanks for the tip! Charlie

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<div class="post-metadata">

### Author: ![aron.helser](https://discourse.paraview.org/user_avatar/discourse.paraview.org/aron.helser/32/13_2.png) [@aron.helser](https://discourse.paraview.org/u/aron.helser)
#### Post date: [January 5, 2021, 4:51pm UTC](https://discourse.paraview.org/t/error-when-running-remoteview-example-with-paraview-pv-server-py/6104/7 "2021-01-05T16:51:06Z")

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We’re following up in an issue: [https://gitlab.kitware.com/paraview/paraview/-/issues/20419](https://gitlab.kitware.com/paraview/paraview/-/issues/20419)  
Looks like there are some additional problems, too.