Different fit results depending on ROOT version

Hi,
There was a bug in the old ROOT version, see

TGraphAsymm x-Errors in pol fit?

The error on the x coordinates was not considered in these old fit. If you add the option “EX0” (0 error in x) when fitting with the 5.34 version, you will get the same result as the 5.30 version

Best Regards

Lorenzo