Dear Heena, 

unfortunately, we failed in cherry picking a default value in the parameter 
file. 

The generated parameter handler tries to write output files in a `results` 
directory (as indicated in the default parameter file `set Output directory = 
results`), which however is not created by the installation. You can either 
change the parameter file and set the output directory to `.` or create the 
directory `results` in the location where you are running the program. 

Wolfgang, it seems that indeed the default parameter file in 9.2 still contains 
`set Output directory = results`. :(

L.


> On 5 Jun 2020, at 7:03, heena patel <heena8...@gmail.com> wrote:
> 
> Dear all,
>                          
>                             I had downloaded latest 9.2 version and had run 
> some tutorials successfully. When I try to run tutorial 70 it gives following 
> error. Kindly help me.
> 
> 
> TimerOutput objects finalize timed values printed to the
> screen by communicating over MPI in their destructors.
> Since an exception is currently uncaught, this
> synchronization (and subsequent output) will be skipped
> to avoid a possible deadlock.
> ---------------------------------------------------------
> 
> 
> ----------------------------------------------------
> Exception on processing: 
> 
> --------------------------------------------------------
> An error occurred in line <1360> of file 
> </home/heena/Downloads/dealii-9.2.0/source/base/parameter_handler.cc> in 
> function
>     void dealii::ParameterHandler::print_parameters(const string&, 
> dealii::ParameterHandler::OutputStyle) const
> The violated condition was: 
>     out
> Additional information: 
>     An input/output error has occurred. There are a number of reasons why 
> this may be happening, both for reading and writing operations.
> 
> If this happens during an operation that tries to read data: First, you may 
> be trying to read from a file that doesn't exist or that is not readable 
> given its file permissions. Second, deal.II uses this error at times if it 
> tries to read information from a file but where the information in the file 
> does not correspond to the expected format. An example would be a truncated 
> file, or a mesh file that contains not only sections that describe the 
> vertices and cells, but also sections for additional data that deal.II does 
> not understand.
> 
> If this happens during an operation that tries to write data: you may be 
> trying to write to a file to which file or directory permissions do not allow 
> you to write. A typical example is where you specify an output file in a 
> directory that does not exist.
> --------------------------------------------------------
> 
> 
> Regards,
> Heena
> 
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