Hello, As said in the installguide from the MPICH website, I am contacting you because I've got an error during the installation in the c.txt file, and I think this error stop my progression to the installation because I cannot do the step 6. At the bottom of the file it is said " configure: error : no ch4 netmod selected". This may be a self explanatory error but I'm a beginner on Ubuntu and my skills are limited yet. Could you help me with this problem ? Sincerely, Guyot C