# TT Tutorial- Project Error

**URL:** <https://forum.inductiveautomation.com/t/tt-tutorial-project-error/71360>\
**Category:** Ignition\
**Tags:** sepasoft\
**Created:** [March 21, 2023, 10:13am UTC](https://forum.inductiveautomation.com/t/tt-tutorial-project-error/71360 "2023-03-21T10:13:37Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**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 21, 2023, 10:13am UTC](https://forum.inductiveautomation.com/t/tt-tutorial-project-error/71360/1 "2023-03-21T10:13:37Z")

</div>

Hello,

I am practicing Track and Trace module and developing screen as per manual instruction.  
I am getting following attached error when and clicked on "Create Material Defination + Class" and on other button also.  
Can anyone help me out finding my mistake?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/2/3253b861ecbe3361fc2bc6094bc8aa919a1b13e5.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/4/046f7d2f024207888cde18e881bcc55d1844cf48.png)