# Track and Trace: Using same LOT number

**URL:** <https://forum.inductiveautomation.com/t/track-and-trace-using-same-lot-number/71615>\
**Category:** General Discussion\
**Tags:** sepasoft\
**Created:** [March 27, 2023, 5:22am UTC](https://forum.inductiveautomation.com/t/track-and-trace-using-same-lot-number/71615 "2023-03-27T05:22:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rohit\_Mehar](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/rohit_mehar/32/55621_2.png) [@Rohit\_Mehar](https://forum.inductiveautomation.com/u/Rohit_Mehar)\
**Post date:** [March 27, 2023, 5:22am UTC](https://forum.inductiveautomation.com/t/track-and-trace-using-same-lot-number/71615/1 "2023-03-27T05:22:17Z")

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Hello There,

I am practicing Sepasoft's Track and Trace Module. My problem statement is make a Final product which is going to assemble in 3 different machines.  
for which I want to use **same Lot Number at all stations**.  
I have done the configuration as in following attachments. But when I tried to run segment for part 2 it giving me Lot Number erorr.  
is anybody here help me out with this?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/6/d627effb47dfacb31b059f346549ac6325b1d7c7.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/0/a00f4d6b59279c6a859aa6726b49f8200bd8ed43.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/e/5ee05dcde772ac3bec13c9f3c2434ed75f2ebc3c.png)

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<div class="post-metadata">

**Author:** ![jesse.records](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jesse.records/32/10960_2.png) [@jesse.records](https://forum.inductiveautomation.com/u/jesse.records)\
**Post date:** [March 27, 2023, 5:24pm UTC](https://forum.inductiveautomation.com/t/track-and-trace-using-same-lot-number/71615/2 "2023-03-27T17:24:37Z")

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Hello @Rohit_Mehar ,

Reusing a lot number requires the increment of the lot sequence number, suggesting a linkage of materials as it is transformed over time.

You cannot use the same lot with the same lot sequence because that is a unique material object (as a snapshot in time).

We also recommend new trace projects utilize the trace functions ([system.mes.trace - MES Platform 3.0 - Sepasoft MES Help Documentation](https://help.sepasoft.com/docs/display/SEPA/system.mes.trace)) instead of the legacy trace functions which require process segment definitions and management of runtime operations objects.

It may be beneficial to schedule a call to review your requirements to help with the design.

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