The set definition was used before the set was created

Thank you very much for the explanations. Unbelievable to know that much with so scarcely available material around CalculiX.

you missed the target, using enquire in the graphical window you can see the coordinate of some nodes and see they aren’t inside your box, so support was created empty:

enq nodes support rec 0 _ 10 1 i
mode:i tol:1.000000
prnt se
1     all stat:o n:298 e:160 f:232 p:8 l:12 c:0 s:6 b:1 L:0 S:0 se:0 sh:0 v:0
3     new stat:c n:4 e:0 f:0 p:3 l:1 c:0 s:0 b:0 L:0 S:0 se:0 sh:0 v:0
4     load stat:c n:27 e:0 f:16 p:4 l:4 c:0 s:1 b:0 L:0 S:0 se:0 sh:0 v:0
5     ref stat:c n:1 e:0 f:0 p:0 l:0 c:0 s:0 b:0 L:0 S:0 se:0 sh:0 v:0
6     nodes stat:c n:27 e:0 f:0 p:0 l:0 c:0 s:0 b:0 L:0 S:0 se:0 sh:0 v:0
7     -NJBY stat:c n:0 e:0 f:0 p:0 l:0 c:0 s:0 b:0 L:0 S:0 se:0 sh:0 v:0
8     support stat:c n:0 e:0 f:0 p:0 l:0 c:0 s:0 b:0 L:0 S:0 se:0 sh:0 v:0
pic node
43 xyz= 200.000000 14.142136 -21.213203
axyz= 56.309932 96.054498 4.044691 rxyz= 25.495098 201.121854 200.499377
    in set=load(4),nodes(6),
 done
pic node
298 xyz= 200.000000 -14.142136 21.213203
axyz= 123.690068 83.945502 4.044691 rxyz= 25.495098 201.121854 200.499377
    in set=load(4),nodes(6),
 done

the manuals of CGX and CCX are pretty good, however there is so much information that at the beginning they may seem cumbersome. Persevere! it pays off.

To absorb what you say here I need several days. Thank you.

I read the material and oops, you can see how badly I do.

Looks like geometry I do somehow applicable to my problems

valu Etyp he8

preprocessing

geometry

seto beam
pnt p0 0 0 0
pnt p1 0 1006.5 0

line l0 p0 p1
seta se0 l l0

swep se0 se1 tra 5 0 0
seta ses0 A001

swep ses0 ses1 tra 0 0 38.2 8

seta rear A005
seta front A006
comp rear e
rep rear
comp rear f
rep rear

comp front e
rep front
comp front f
rep front

seta extend A002
swep extend extended tra 0 0 9.8
setc beam

elty beam Etyp
mesh beam
send beam abq

send rear abq surf
send front abq surf
send rear abq spc 2
send rear abq pres 3000
send front abq pres 3000
plot f rear g
plus f front r

But input deck is something, there is no clue what mistake I make

*HEADING
Model: CalculiX Beam Input File for welding experiment
*INCLUDE,INPUT=beam.msh
*BOUNDARY
*INCLUDE,INPUT=rear_2.bou
*MATERIAL,NAME=EL
*ELASTIC
2e6,0.3
*SOLID SECTION,ELSET=beam,MATERIAL=EL
*STEP,PERTURBATION # though is allowed for
#*FREQUENCY and *BUCKLE steps only.
*STATIC
*DLOAD
*INCLUDE,INPUT=front.dlo
*STEP
*STATIC
*DLOAD
*INCLUDE,INPUT=rear.dlo
*NODE FILE
U
*EL FILE
S
*END STEP

your element set is called Ebeam, not beam. And later you have defined 2 steps without *end step on first step, in case you wanted only one step with the 2 load sets, then remove the second *step card:

*HEADING
Model: CalculiX Beam Input File for welding experiment
*INCLUDE,INPUT=beam.msh
*BOUNDARY
*INCLUDE,INPUT=rear_2.bou
*MATERIAL,NAME=EL
*ELASTIC
2e6,0.3
*SOLID SECTION,ELSET=Ebeam,MATERIAL=EL
*STEP,PERTURBATION # though is allowed for
**comments in CCX start with 2 asterisks
**#*FREQUENCY and *BUCKLE steps only.
*STATIC
*DLOAD
*INCLUDE,INPUT=front.dlo
*NODE FILE
U
*EL FILE
S
*END STEP
*STEP
*STATIC
*DLOAD
*INCLUDE,INPUT=rear.dlo
*NODE FILE
U
*EL FILE
S
*END STEP

I corrected and tried it with two and one *End step

ccx -c beam

*Error in readinput: cannot open file -c.inp

What else. I replace PERTURBATION with NLGEOM and issue

ccx beam. Why is it so?

It was calculating, and then stopped with
*Error: increment size smaller than minimum best solution and residuals are in the frd file

Now it even works

cgx beam.frd

Datasets Entity All shows up, but displacement
freeglut (cgx): menue manipulation not allowed while menues in use.

I pasted a working version already. Try it.

I did. I made some versions of it. Displacement does not show up. I have to leave you till tomorrow, sorry. Lot of questions.

What is your version of CalculiX? By the way my ccx_2.11 I compiled myself and tests were good.

my version is the latest: 2.20, but your file should run in much earlier versions
EDIT: it was different before…v2.11 worked in a different way. check the manual http://www.dhondt.de/ccx_2.11.pdf compared to current version: http://www.dhondt.de/ccx_2.20.pdf. To make previous file work just remove PERTURBATION from the
*static keyword. If you want to activate non linear effect you have to add NLGEOM.

I recommed you move to current version considering you’re a new user. Compilation is the same you just get the new source files.

You are right it works on my site too. But without NLGEOM, while animate, looks like a simple beam with one end being squeezed and force being applied to the other end. In this case I need to know diflection in the middle of beam and by default it is provided on one end of beam. Is there any way around?

My calculation of deflection of the beam is 0.8 cm, I do not understand where to look at to compare results.