@Disla , I believe, ccx explicit has a floating or uninitialized variable. This data set runs sometimes and sometimes not. It seems to be random whether it like to run as explict or not
**
** --- Coordinates for 15 dgr starting angle
***Node
**1, 0.0, 0.0, 0.0
**2, 61.7638090, -183.185165, 0.0
**3, 41.7638090, -183.185165, 0.0
**4, 41.7638090, -203.185165, 0.0
**5, 61.7638090, -203.185165, 0.0
**6, 61.7638090, -183.185165, 1.0
**7, 41.7638090, -183.185165, 1.0
**8, 41.7638090, -203.185165, 1.0
**9, 61.7638090, -203.185165, 1.0
**10, 51.7638090, -193.185165, 0.0
**11, 51.7638090, -193.185165, 1.0
**12, 0.0, 0.0, 0.0
** --- Coordinates for 45 dgr starting angle
***Node
**1, 0.0, 0.0, 0.0
**2, 151.421356, -131.421356, 0.0
**3, 131.421356, -131.421356, 0.0
**4, 131.421356, -151.421356, 0.0
**5, 151.421356, -151.421356, 0.0
**6, 151.421356, -131.421356, 1.0
**7, 131.421356, -131.421356, 1.0
**8, 131.421356, -151.421356, 1.0
**9, 151.421356, -151.421356, 1.0
**10, 141.421356, -141.421356, 0.0
**11, 141.421356, -141.421356, 1.0
**12, 0.0, 0.0, 0.0
** --- Coordinates for 135 dgr starting angle
*Node
1, 0.0, 0.0, 0.0
2, 151.421356, 151.421356, 0.0
3, 131.421356, 151.421356, 0.0
4, 131.421356, 131.421356, 0.0
5, 151.421356, 131.421356, 0.0
6, 151.421356, 151.421356, 1.0
7, 131.421356, 151.421356, 1.0
8, 131.421356, 131.421356, 1.0
9, 151.421356, 131.421356, 1.0
10, 141.421356, 141.421356, 0.0
11, 141.421356, 141.421356, 1.0
12, 0.0, 0.0, 0.0
**
*Element, Type=C3D6, Elset=body
34, 2, 3, 10, 6, 7, 11
35, 5, 2, 10, 9, 6, 11
36, 3, 4, 10, 7, 8, 11
37, 4, 5, 10, 8, 9, 11
**
*Nset, Nset=BodyCenter
10
*Nset, Nset=Origon
12
**
*Material, Name=Steel
*Density
7.8E-09
*Elastic
210000, 0.3
**
*Solid section, Elset=body, Material=Steel
** --- Using a stiff spring as connecting rod
*Element, Type=springa, Elset=Espring
200, 10, 12
**
*Spring, Elset=Espring
1000000.
** --- Locking the mass moment of initia
*Equation
2
2,2,1.,3,2,-1.
2
2,3,1.,3,3,-1.
**node,dir,fact,node,dir,fact ......... = 0
**
*Step, Nlgeom, Inc=4000
*Dynamic, Explicit
0.001, 0.75, 1E-05, 0.001
**
*Boundary, op=New
Origon, 1, 3, 0
**
*Dload, op=New
Body, Grav, 9820, 0, -1, 0
**
*Node print, Nset=BodyCenter, Totals=Yes
V
**
*Node file
RF, U, V
*El file
S, E
*End step