# ccx\_SPOOLES.exe result better than ccx\_PARDISO.exe result

**URL:** <https://calculix.discourse.group/t/ccx-spooles-exe-result-better-than-ccx-pardiso-exe-result/294>\
**Category:** Uncategorized\
**Created:** [November 12, 2020, 5:55am UTC](https://calculix.discourse.group/t/ccx-spooles-exe-result-better-than-ccx-pardiso-exe-result/294 "2020-11-12T05:55:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![phb](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@phb](https://calculix.discourse.group/u/phb)\
**Post date:** [November 12, 2020, 5:55am UTC](https://calculix.discourse.group/t/ccx-spooles-exe-result-better-than-ccx-pardiso-exe-result/294/1 "2020-11-12T05:55:40Z")

</div>

Just starting with CalculiX, and I obtained a result which gave me pause. Perhaps it is related to the expansion of T2D2 elements, but I could not explain the observation

Using ccx\_SPOOLES.exe and ccx\_PARDISO.exe, different results are obtained from a little test script.  
The script was an Abaqus inp file from the internet ([https://www.seas.harvard.edu/courses/es128/Truss3.inp](https://www.seas.harvard.edu/courses/es128/Truss3.inp)), modified to run with ccx.  
CCX for windows was obtained from [http://www.dhondt.de/calculix\_2.17.1\_4win.zip](http://www.dhondt.de/calculix_2.17.1_4win.zip).  
I installed the Intel libraries, and updated my path.  
I monitored the displacement of node 4, and expected the Z displacement to be near zero.  
This was close to true for SPOOLES, but not for PARDISO.

SPOOLES:  
-1 1 0.00000E+00 3.38813E-21-2.54110E-21  
-1 2 0.00000E+00 0.00000E+00 8.47033E-22  
-1 3 0.00000E+00 0.00000E+00 4.23516E-22  
-1 4-7.05766E-03-2.84157E-03 **8.76424E-04**

PARDISO:  
-1 1 0.00000E+00 0.00000E+00 1.99476E-19  
-1 2 0.00000E+00 0.00000E+00 1.65171E-20  
-1 3 4.23516E-22 4.33681E-19-4.23516E-22  
-1 4-7.05766E-03-2.84157E-03 **-5.32285E-01**

My windows path is  
c:\intelpython3;c:\intelpython3\Scripts;C:\intelpython3\pkgs\openssl-1.1.1g-vc14he774522\_5\Library\bin;C:\calculix\_2.17.1\_4win;C:\calculix\_2.17.1\_4win\cgxCadTools;C:\Program Files (x86)\IntelSWTools\compilers\_and\_libraries\_2020.4.311\windows\ipp\lib\intel64\_win;C:\Program Files (x86)\IntelSWTools\compilers\_and\_libraries\_2020.4.311\windows\redist\intel64\_win\mkl;C:\Program Files (x86)\IntelSWTools\compilers\_and\_libraries\_2020.4.311\windows\mkl\lib\intel64\_win;C:\Program Files (x86)\IntelSWTools\compilers\_and\_libraries\_2020.4.311\windows\mkl\lib\intel64;

Stripped of most comments, the script becomes:

\*HEADING  
Three Bar Truss: ES128 Example Problem  
\*NODE, NSET=BARSET  
4, 10.0, 0.0, 0.0  
1, 5.0, 10.0, 0.0  
2, 7.5, 10.0, 0.0  
3, 10.0, 10.0, 0.0  
\*\*  
\*ELEMENT, TYPE=T2D2, ELSET=BARS  
1, 4, 1  
2, 4, 2  
3, 4, 3  
\*\*  
\*SOLID SECTION, ELSET=BARS, MATERIAL=MAT1  
0.1  
\*MATERIAL, NAME=MAT1  
\*ELASTIC  
30e6, 0.3, 294  
\*\*  
\*BOUNDARY  
1, 1, 3  
2, 1, 3  
3, 1, 3  
\*\*  
\*STEP, PERTURBATION  
\*STATIC  
\*\*  
\*CLOAD  
4, 2, -1000  
\*\*  
\*OUTPUT  
\*\*  
\*EL PRINT, ELSET=BARS  
S, E, COORD  
\*NODE PRINT, NSET=BARSET  
U  
\*NODE FILE  
U  
\*\*  
\*END STEP

---

<div class="post-metadata">

**Author:** ![rafal.brzegowy](https://avatars.discourse-cdn.com/v4/letter/r/a9adbd/32.png) [@rafal.brzegowy](https://calculix.discourse.group/u/rafal.brzegowy)\
**Post date:** [November 12, 2020, 10:03am UTC](https://calculix.discourse.group/t/ccx-spooles-exe-result-better-than-ccx-pardiso-exe-result/294/2 "2020-11-12T10:03:53Z")

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At first glance it reminds me of this (topic from yahoo groups):

“\*RADIATE wrong solution and only a single iteration x x”