Hi Nicholas,
On Fri, Sep 3, 2021, at 12:49 CDT, Nicholas Yue <yue.nicho...@gmail.com> wrote:
> Hi
>
> It seems to be consistently failing when writing the checkpoint file(s)
>
> Are there special flags I need to setup up for some form of parallel IO
> that may be happening ?
> [...]
> Additional information:
> deal.II encountered an error while calling an MPI function.
> The description of the error provided by MPI is "MPI_ERR_FILE: invalid
> file".
> The numerical value of the original error code is 30.
This is interesting. It seems that MPI IO is failing.
Do you write into a distributed file system that is replicated among nodes?
Would you mind testing running the code with checkpointing disabled,
something like:
diff --git a/examples/step-69/step-69.cc b/examples/step-69/step-69.cc
index 4a801f97ba..4b7c9a2f63 100644
--- a/examples/step-69/step-69.cc
+++ b/examples/step-69/step-69.cc
@@ -2595,7 +2595,7 @@ namespace Step69
if (t > output_cycle * output_granularity)
{
- checkpoint(U, base_name, t, output_cycle);
+ // checkpoint(U, base_name, t, output_cycle);
output(U, base_name, t, output_cycle);
++output_cycle;
}
I am interested in seeing whether the solution output (into vtu) works.
Best,
Matthias
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