Calculated BMDs are 0

Hi Guangyan,
I ran EcotoxXplorer several months ago for the chemical CuSO₄ and obtained BMD values for the 10th percentile and Max 1st peak. However, when I ran it again today using the same raw data and the same factor afterward, both BMDs for the 10th percentile and Max 1st peak came out as 0. Could you help me check what might be wrong?

The specified analysis is Dose-response analysis.
The specified organism is O. mykiss (rainbow trout).
The specified chip version is Version 0.1.
The specified chip size is 384.

If you need my raw data, just let me know.

Yanan