# Deserialization issue

**URL:** <https://discourse.pumas.ai/t/deserialization-issue/1284>\
**Category:** Uncategorized\
**Created:** [September 19, 2025, 8:41am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284 "2025-09-19T08:41:18Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Vaibhavraj](https://avatars.discourse-cdn.com/v4/letter/v/dbc845/32.png) [@Vaibhavraj](https://discourse.pumas.ai/u/Vaibhavraj)\
**Post date:** [September 19, 2025, 8:41am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/1 "2025-09-19T08:41:18Z")

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Hello,

I am getting below error when I am trying to deserialize a .jls file.

ERROR: TypeError: in PumasModel, in Q, expected Q\<:Pumas.RandomObj, got Type{Serialization.\__deserialized\_types_\_.var"#5#14"}

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<div class="post-metadata">

**Author:** ![vijay](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/vijay/32/96_2.png) [@vijay](https://discourse.pumas.ai/u/vijay)\
**Post date:** [September 19, 2025, 9:05am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/2 "2025-09-19T09:05:01Z")

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Are you in Pumas 2.7 and trying to deserialize an object from Pumas 2.6.1?

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<div class="post-metadata">

**Author:** ![Vaibhavraj](https://avatars.discourse-cdn.com/v4/letter/v/dbc845/32.png) [@Vaibhavraj](https://discourse.pumas.ai/u/Vaibhavraj)\
**Post date:** [September 19, 2025, 9:22am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/3 "2025-09-19T09:22:07Z")

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I am trying it in Pumas 2.7.0

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<div class="post-metadata">

**Author:** ![Vaibhavraj](https://avatars.discourse-cdn.com/v4/letter/v/dbc845/32.png) [@Vaibhavraj](https://discourse.pumas.ai/u/Vaibhavraj)\
**Post date:** [September 23, 2025, 9:37am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/4 "2025-09-23T09:37:42Z")

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Yes, I am in Pumas 2.7 and trying to deserialize an object from Pumas 2.6.1

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<div class="post-metadata">

**Author:** ![vijay](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/vijay/32/96_2.png) [@vijay](https://discourse.pumas.ai/u/vijay)\
**Post date:** [September 29, 2025, 6:25am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/5 "2025-09-29T06:25:50Z")

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Unfortunately, 2.6.1 projects cannot be deserialized in 2.7. What is the object that you are deserializing? is it a fit? if it is taking a short time to run, perhaps you should run it again.

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<div class="post-metadata">

**Author:** ![Vaibhavraj](https://avatars.discourse-cdn.com/v4/letter/v/dbc845/32.png) [@Vaibhavraj](https://discourse.pumas.ai/u/Vaibhavraj)\
**Post date:** [October 8, 2025, 8:24am UTC](https://discourse.pumas.ai/t/deserialization-issue/1284/6 "2025-10-08T08:24:51Z")

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Yes, it is a fit. I refitted the same model in 2.7 then it worked.