# Error while running a script

**URL:** <https://forum.itascainternational.com/t/error-while-running-a-script/2156>\
**Category:** PFC\
**Tags:** fish\
**Created:** [July 11, 2025, 9:59pm UTC](https://forum.itascainternational.com/t/error-while-running-a-script/2156 "2025-07-11T21:59:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![AlaaAbdallah](https://avatars.discourse-cdn.com/v4/letter/a/8e7dd6/32.png) [@AlaaAbdallah](https://forum.itascainternational.com/u/AlaaAbdallah)\
**Post date:** [July 11, 2025, 9:59pm UTC](https://forum.itascainternational.com/t/error-while-running-a-script/2156/1 "2025-07-11T21:59:11Z")

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Hello,

I have faced this error and I was unable to solve it. Could anyone please help me or direct me how to solve such errors?

Best regards,  
Alaa

 ![Error1](https://canada1.discourse-cdn.com/flex031/uploads/itasca/original/2X/5/528fadb1b80ce6558cc8023ff9407387820a6ea4.png)  
 ![Error2](https://canada1.discourse-cdn.com/flex031/uploads/itasca/original/2X/a/a83fb3f2520c596d53aa5cf9f00b32a7d172c2c7.png)

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**Author:** ![dpotyondy](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/dpotyondy/32/1399_2.png) [@dpotyondy](https://forum.itascainternational.com/u/dpotyondy)\
**Post date:** [July 12, 2025, 2:53pm UTC](https://forum.itascainternational.com/t/error-while-running-a-script/2156/2 "2025-07-12T14:53:37Z")

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You need to define this FISH variable as global. After line 54, add the line { [global peak\_fraction }.

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<div class="post-metadata">

**Author:** ![AlaaAbdallah](https://avatars.discourse-cdn.com/v4/letter/a/8e7dd6/32.png) [@AlaaAbdallah](https://forum.itascainternational.com/u/AlaaAbdallah)\
**Post date:** [July 22, 2025, 6:55pm UTC](https://forum.itascainternational.com/t/error-while-running-a-script/2156/3 "2025-07-22T18:55:50Z")

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Thank you. It worked!