# Import Address Configuration get The value of 'prefix' is not between 1 and 12 characters long

**URL:** <https://forum.inductiveautomation.com/t/import-address-configuration-get-the-value-of-prefix-is-not-between-1-and-12-characters-long/80356>\
**Category:** Ignition\
**Created:** [October 11, 2023, 7:15pm UTC](https://forum.inductiveautomation.com/t/import-address-configuration-get-the-value-of-prefix-is-not-between-1-and-12-characters-long/80356 "2023-10-11T19:15:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Emile\_Laplante](https://avatars.discourse-cdn.com/v4/letter/e/c57346/32.png) [@Emile\_Laplante](https://forum.inductiveautomation.com/u/Emile_Laplante)\
**Post date:** [October 11, 2023, 7:15pm UTC](https://forum.inductiveautomation.com/t/import-address-configuration-get-the-value-of-prefix-is-not-between-1-and-12-characters-long/80356/1 "2023-10-11T19:15:10Z")

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Hi,

I try to import a modbus table from a schneider PLC. When I try to import the file, I get the following message :

The value of 'prefix' is not between 1 and 12 characters long.

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/6/26e18f9d50e88a88afd7aebe06d99f235910ff1a.png)

Is it possible to get a prefix with more than 12 characters? Why is there any restriction?

Thank you!|

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**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\
**Post date:** [October 11, 2023, 7:16pm UTC](https://forum.inductiveautomation.com/t/import-address-configuration-get-the-value-of-prefix-is-not-between-1-and-12-characters-long/80356/2 "2023-10-11T19:16:12Z")

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The import and export on the modbus mapping pages is meant for Ignition (created) mapping. It does not support importing from 3rd parties.

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<div class="post-metadata">

**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\
**Post date:** [October 11, 2023, 7:18pm UTC](https://forum.inductiveautomation.com/t/import-address-configuration-get-the-value-of-prefix-is-not-between-1-and-12-characters-long/80356/3 "2023-10-11T19:18:50Z")

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Most recommend to not use the mapping feature at all, instead manually create tags using the following format:

[https://docs.inductiveautomation.com/display/DOC81/Modbus+Addressing](https://docs.inductiveautomation.com/display/DOC81/Modbus+Addressing)

I only use the mapping feature if I have a large amount of consecutive tags.