Hello,
It is better to make a copy of the test case:
C:\opentelemac\validation\telemac2d\tel2d_v6p2\023_estimation\
and open a Window in the folder where is the file t2d_estimation.cas
before running the command:
runcode.py telemac2d t2d_estimation.cas
It makes a shorter command and you will see the files created by the run : r2d_estimation.slf, etc. (their names are given in the file t2d_estimation.cas), you can look at them with Fudaa or Blue Kenue.
However, this case is an example of parameter estimation that automatically does several runs to tune a friction coefficient, so it is not a case to start with, try gouttedo for example, and look at the free surface.
I hope this helps,
Jean-Michel Hervouet