# Unexpected File Format after saving and reoopening a SKP and SKB fiile

**URL:** <https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793>\
**Category:** SketchUp\
**Tags:** unexpectedfileformat\
**Created:** [June 14, 2023, 11:17pm UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793 "2023-06-14T23:17:02Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![xjomarcj](https://avatars.discourse-cdn.com/v4/letter/x/f08c70/32.png) [@xjomarcj](https://forums.sketchup.com/u/xjomarcj)\
**Post date:** [June 14, 2023, 11:17pm UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793/1 "2023-06-14T23:17:02Z")

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> **[This one is SKP.skp](https://www.dropbox.com/s/a00qyngifh8qly6/This%20one%20is%20SKP.skp?dl=0)**
>
> Shared with Dropbox

> **[This one Skb but i try to change SKP.skp](https://www.dropbox.com/s/hv5edtkc5yqynrn/This%20one%20Skb%20but%20i%20try%20to%20change%20SKP.skp?dl=0)**
>
> Shared with Dropbox

Im currently 5th year student thesis i hope somebody help me asap thanks a lot and have a great day!

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**Author:** ![colin](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/colin/32/266703_2.png) [@colin](https://forums.sketchup.com/u/colin)\
**Post date:** [June 14, 2023, 11:47pm UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793/2 "2023-06-14T23:47:56Z")

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I couldn’t recover the SKP, but did recover the backup file:

> **[This one Skb but i try to change SKP recovered.skp](https://wetransfer.com/downloads/24e6ab5715bbbae41b938807cc06e2c320230614234700/8021c4)**
>
> 1 file sent via WeTransfer, the simplest way to send your files around the world

Do you know what sorts of changes you made within the last session?

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<div class="post-metadata">

**Author:** ![xjomarcj](https://avatars.discourse-cdn.com/v4/letter/x/f08c70/32.png) [@xjomarcj](https://forums.sketchup.com/u/xjomarcj)\
**Post date:** [June 15, 2023, 5:09am UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793/3 "2023-06-15T05:09:48Z")

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Hello colin, Thanks a lot i already open it. Im super glad because it consume me a lot of hrs just working on that one. Thanks again. Have a great day.

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<div class="post-metadata">

**Author:** ![xjomarcj](https://avatars.discourse-cdn.com/v4/letter/x/f08c70/32.png) [@xjomarcj](https://forums.sketchup.com/u/xjomarcj)\
**Post date:** [June 15, 2023, 6:00am UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793/4 "2023-06-15T06:00:25Z")

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@colin hello can u upload the skp file 2021? thanks a lot.

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<div class="post-metadata">

**Author:** ![colin](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/colin/32/266703_2.png) [@colin](https://forums.sketchup.com/u/colin)\
**Post date:** [June 15, 2023, 1:58pm UTC](https://forums.sketchup.com/t/unexpected-file-format-after-saving-and-reoopening-a-skp-and-skb-fiile/232793/5 "2023-06-15T13:58:42Z")

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I have some better news. One of the developers managed to recover the SKP.

> **[This one is SKP (recovered).skp](https://wetransfer.com/downloads/ca8847ffdf53debf94fc1095c73ac64720230615135604/d2a49b)**
>
> 1 file sent via WeTransfer, the simplest way to send your files around the world

Even though this is a 2023 file, you can open it in 2021.