BJeannot1

Unfortunately, I am affraid I cannot easily share my files, for confidentiality reasons. However, I can confirm that multiplying all concentrations by 1e11 indeed solved the problem. Thank you for...

Checking the case.obs+noise file, I notice that the values look correct for the base realization (it looks like there is no observation noise for this realization anyway), but out of...

Yes, I confirm I use the standard_deviation of the the obs_data.csv file to set my obs noise. Thank you.

So here is where we got so far: -Using very small concentration values in the observations (1e-9), along with other observations of piezometry (around 10²m high) while activating ies_phi_factor_file generates...

Thank you for your insights. I am amazed to notice that I do not have the text you provided in your picture in my rec file. And I think I...

I confirm that removing the space before "standard_deviation" solved the issue with the case.obs+noise.csv file. Thank you for your help. As regards the other comment you made, converting the conentrations...

If it does not contradict the purpose of PEST++, it may also be useful to only accept as column names a list of specific strings which are to be defined...