Decompression error
 

Hi!

I am getting a strange error in the initialization of the solver. I have never encountered this error before, and I have no more ideas on how to solve it.

I am using Ansys CFX 16.1
The error occurs in the partitioning part of the solver.

The geometry is relatively large (~85 million elements)
So I have tried to use the "Large problem partitioner", but that didn't help.

Do you have any idea on how I should address this problem?

Here is a draft from the out-file:


+--------------------------------------------------------------------+
| Job Information at Start of Run |
+--------------------------------------------------------------------+

Run mode: partitioning run

Host computer: HPC-POLLUX (PID:3752)

Job started: Sat Apr 02 07:39:50 2016

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| io_gunzip: decompressed too little data: got 400000 bytes, expect- |
| ed 547356 |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| read_compressed_dataarray: decompression failed |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| iocnt: read data failed |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| RedSht: read data failed: what=G/NFCFS where=ZN1 |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine RedSht |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX partitioner exited with return code 1. |
+--------------------------------------------------------------------+

That certainly is a weird error. I would try:
* different partitioning algorithms
* doing a partitioning only run and write a partition file. Try doing this on several machines.
* Check your def file is good - go back to CFX-Pre and check it and regenerate it.

Thank you for your feedback. I will try and let you know when I know more.