# Creating one single TR3 Element with mesh in cgx

**URL:** <https://calculix.discourse.group/t/creating-one-single-tr3-element-with-mesh-in-cgx/2741>\
**Category:** CalculiX GraphiX\
**Created:** [May 16, 2025, 2:41am UTC](https://calculix.discourse.group/t/creating-one-single-tr3-element-with-mesh-in-cgx/2741 "2025-05-16T02:41:14Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![dichtstoff](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dichtstoff](https://calculix.discourse.group/u/dichtstoff)\
**Post date:** [May 16, 2025, 2:41am UTC](https://calculix.discourse.group/t/creating-one-single-tr3-element-with-mesh-in-cgx/2741/1 "2025-05-16T02:41:14Z")

</div>

Hello,

i want to create one single TR3 Element with mesh,  
but i got these error:

ERROR: surf:A001 with 3 edges uses at least one line:L001 with div \<2, this is not permitted. surf not meshed.

i don’t want it make by hand, so is there a workaround for these issue?  
thnx in advance for your help

wbr dichtstoff

```auto
# TR3-Element

PNT ! 0 0 0
PNT ! 0 5 0
PNT ! 5 0 0

LINE ! D001 D002 101
LINE ! D002 D003 101
LINE ! D003 D001 101

GSUR A001 + BLEND + L001 + L002 + L003

ELTY all TR3
MESH all

prnt se
plot e all
view elem

```

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<div class="post-metadata">

**Author:** ![dichtstoff](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dichtstoff](https://calculix.discourse.group/u/dichtstoff)\
**Post date:** [May 17, 2025, 7:26am UTC](https://calculix.discourse.group/t/creating-one-single-tr3-element-with-mesh-in-cgx/2741/2 "2025-05-17T07:26:28Z")

</div>

![hcpy_1](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/a/a4346844358c84b7fb4b40122dd165fec7a82d2c.png)

ELEM ! 18 20 81 tr3  
ELEM ! 24 22 82 tr3  
ELEM ! 58 60 109 tr3  
ELEM ! 64 62 110 tr3

there will be no possibility to generate one element automatically?

wbr dichtstoff

---

<div class="post-metadata">

**Author:** ![dichtstoff](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dichtstoff](https://calculix.discourse.group/u/dichtstoff)\
**Post date:** [May 19, 2025, 9:24pm UTC](https://calculix.discourse.group/t/creating-one-single-tr3-element-with-mesh-in-cgx/2741/3 "2025-05-19T21:24:13Z")

</div>

i have found a solution for me.  
i have created a triangle with one QU4 element.  
these works fine for me. i have no different results.  
is there a possibility to divide lines with cgx?

```auto
# single triangle element

PNT ! 0 0 0
PNT ! 0 5 0
PNT ! 2.5 2.5
PNT ! 5 0 0

LINE ! D001 D002 101
LINE ! D002 D003 101
LINE ! D003 D004 101
LINE ! D004 D001 101

GSUR A001 + BLEND + L001 + L002 + L003 + L004

ELTY all QU4
MESH all

prnt se
plot e all
plus n all
view elem

```

 ![hcpy_1](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/c/c9b55f224652b17e9de0ec324911ce7175f45433.png)