Hi Nicolas,
We are sorry for the delay in getting back to you.
Could you please get back to us with the excel file which reproduces the above reported Overflow exception so that it will be helpful for us to proceed further on this. Also, please get back to us with the Stact trace of an above error and the Essential Studio version to analyze more on this.
Please let me know if you require any further clarifications.
Thanks,
Sridhar.S