# CGX read Netgen mesh of quad linear element

**URL:** <https://calculix.discourse.group/t/cgx-read-netgen-mesh-of-quad-linear-element/1777>\
**Category:** CalculiX GraphiX\
**Created:** [August 24, 2023, 5:41am UTC](https://calculix.discourse.group/t/cgx-read-netgen-mesh-of-quad-linear-element/1777 "2023-08-24T05:41:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![xyont](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/xyont/32/3553_2.png) [@xyont](https://calculix.discourse.group/u/xyont)\
**Post date:** [August 24, 2023, 5:41am UTC](https://calculix.discourse.group/t/cgx-read-netgen-mesh-of-quad-linear-element/1777/1 "2023-08-24T05:41:41Z")

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Hi,

I’m using NetGen mesh format (\*vol) to prepare a model since group of boundary condition can be predefined, many thanks about these features.

It seems, almost working well for volume & surface element of both linear and quadratic types. Some exception in linear quadrilateral, CGX log given error messages as below,

```auto
elem-type not known, nr of nodes:4

```

Probably it’s not limitation of CGX since quadrilateral element type quadratic is readable and working properly.

Regards,

 ![2023-08-24 12_12_58-](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/c/ccb0e29150374ec1282cd1008519223ae24093f1.png)

 ![2023-08-24 12_09_35-Windows Command Processor - cgx -ng cyl4.vol](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/4/46c618a11484ccd54d59a68b321faea7648ee05f.png)

 ![2023-08-24 12_08_57-CalculiX GraphiX](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/2/2eaa5bc36da4dcb32cde5330958e2e178f92b8e6.png)

 ![2023-08-24 12_17_35-Windows Command Processor - cgx -ng cyl4lin.vol](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/7/7b336945cea6bb7d06bdfacb2811fe21ef7ce05b.png)

 ![2023-08-24 12_17_20-CalculiX GraphiX](https://global.discourse-cdn.com/free1/uploads/calculix/original/2X/9/9d96924d85fc812a9329e6ac9e6beadc0a211933.png)

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**Author:** ![klaus.wittig](https://avatars.discourse-cdn.com/v4/letter/k/4da419/32.png) [@klaus.wittig](https://calculix.discourse.group/u/klaus.wittig)\
**Post date:** [August 27, 2023, 2:57pm UTC](https://calculix.discourse.group/t/cgx-read-netgen-mesh-of-quad-linear-element/1777/2 "2023-08-27T14:57:32Z")

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can you send me your example to [klaus.wittig@calculix.de](mailto:klaus.wittig@calculix.de)?

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<div class="post-metadata">

**Author:** ![xyont](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/xyont/32/3553_2.png) [@xyont](https://calculix.discourse.group/u/xyont)\
**Post date:** [September 1, 2023, 8:59am UTC](https://calculix.discourse.group/t/cgx-read-netgen-mesh-of-quad-linear-element/1777/3 "2023-09-01T08:59:48Z")

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Thank you for looking into the problems, i sending email with attachment recently.