Leafspring builder log error

Hello,

I would like to create a costum leafspring, i have entered the .csv file to give the leafspring builder the overall shape of the leafspring. I have also entered the coordinates for the mounting points. Other than that i left the default settings like the steal properties for example. 

The problem lies when i try to build the spring, I dont have any error in the Cheking phase but once I click ok, I have a message that there is an error in the log. I tried to understand the erros but i dident manage to understand much. I added the .txt file of the error log.

Also when  I check the model there are no error or warnings. 

If someone could help me it would be great.

Thank you !

Best regards,

Angus Duff.