# V1.5.3 - frd file containing results with "compression only" + "contact" can't be opened

**URL:** <https://prepomax.discourse.group/t/v1-5-3-frd-file-containing-results-with-compression-only-contact-cant-be-opened/1240>\
**Category:** Bug Reports\
**Created:** [November 12, 2023, 11:34am UTC](https://prepomax.discourse.group/t/v1-5-3-frd-file-containing-results-with-compression-only-contact-cant-be-opened/1240 "2023-11-12T11:34:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Gunnar](https://avatars.discourse-cdn.com/v4/letter/g/ed655f/32.png) [@Gunnar](https://prepomax.discourse.group/u/Gunnar)\
**Post date:** [November 12, 2023, 11:34am UTC](https://prepomax.discourse.group/t/v1-5-3-frd-file-containing-results-with-compression-only-contact-cant-be-opened/1240/1 "2023-11-12T11:34:21Z")

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Hi,

I wanted to test the new compression only feature, for this i created enclosed file with two models:

1. two parts with contact (plate + bolt) and
2. plate with compression only.

The simulation runs successful but can’t be opened in prepomax - Error:

 ![1](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/8/8e8b1f9f2c2ea23a565bfb396b5951c2be5238c3.png)

the frd file is okay and can be opened in ccx:

 ![3](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/1/148b848a6496d116adacb5d93362a347eae46205.png)

After deleting the 2nd model, the results can be opened again, but before after starting the calculation, the following warning still occurs:

 ![2](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/1/1b0b1e5a97b4679488837ab0ef3277116131fce1.png)

So each model works fine, but it seems a frd file containing results with “compression only” + “contact” can’t be opened in prepomax.

[pmx\_file.zip](https://prepomax.discourse.group/uploads/short-url/m8a9LtLmcSyzXqzuLxIj3XXMshy.zip) (142.5 KB)

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<div class="post-metadata">

**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\
**Post date:** [November 12, 2023, 4:05pm UTC](https://prepomax.discourse.group/t/v1-5-3-frd-file-containing-results-with-compression-only-contact-cant-be-opened/1240/2 "2023-11-12T16:05:57Z")

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I can confirm this bug and I have fixed it in the source code. It will be included in the next release.

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<div class="post-metadata">

**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\
**Post date:** [December 20, 2023, 7:22pm UTC](https://prepomax.discourse.group/t/v1-5-3-frd-file-containing-results-with-compression-only-contact-cant-be-opened/1240/3 "2023-12-20T19:22:31Z")

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