# Error\_TypeConversion

**URL:** <https://forum.inductiveautomation.com/t/error-typeconversion/64708>\
**Category:** Ignition\
**Created:** [September 30, 2022, 2:39pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708 "2022-09-30T14:39:19Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Arun\_Mohan](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@Arun\_Mohan](https://forum.inductiveautomation.com/u/Arun_Mohan)\
**Post date:** [September 30, 2022, 2:39pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708/1 "2022-09-30T14:39:19Z")

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![Error_TypeConversion.PNG](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/9/b900a543fd0e21d28016fa8bd9a063da72c0652b.jpeg)

Hello All,

I need help in solving "Error\_TypeConversion " issue with my OPC tags.  
I have UDT for motors and Transmitter. And in Popup showing a timeout tag which is a byte in PLC program. I am really frustrated with this issue, because its works for some motor but not for others.  
I really don't know what to do next. Please help.  
Attached Screenshot for reference.

TIA  
Arun

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**Author:** ![djs](https://avatars.discourse-cdn.com/v4/letter/d/e47774/32.png) [@djs](https://forum.inductiveautomation.com/u/djs)\
**Post date:** [September 30, 2022, 7:17pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708/2 "2022-09-30T19:17:44Z")

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When you click:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/9/f9fb3d0ae47331373f97e90642a91fe38e158e88.png)  
To see the diagnostics, what does it say?

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<div class="post-metadata">

**Author:** ![Arun\_Mohan](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@Arun\_Mohan](https://forum.inductiveautomation.com/u/Arun_Mohan)\
**Post date:** [September 30, 2022, 7:38pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708/3 "2022-09-30T19:38:28Z")

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![Error_TypeConversion_1](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/5/855557874f3aef542603289891a957571d3f41a2.png)

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [September 30, 2022, 7:45pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708/4 "2022-09-30T19:45:17Z")

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Bytes must be -128 to +127.

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<div class="post-metadata">

**Author:** ![Arun\_Mohan](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@Arun\_Mohan](https://forum.inductiveautomation.com/u/Arun_Mohan)\
**Post date:** [September 30, 2022, 7:48pm UTC](https://forum.inductiveautomation.com/t/error-typeconversion/64708/5 "2022-09-30T19:48:04Z")

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![Error_TypeConversion_2](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/3/c3564f223d5a7655c4fa6fa4456273e6eba85cfd.png)

I Found the issue, If the byte is a Signed one then need to add "C" with the tag not "B".

Thanks for everyone's help