Dear Tony,
thank you very much for your reponse, it did help me find a solution for the issue. I will describe the fixes here in detail so it maybe helps fellow users who might face the same thing.
First to answer your question, I am using Linux (Ubuntu 18.04).
First I needed to change ".bash_profile" into ".profile" in JEMRIS_sim.m, line 432 . I am not knowledgeable of the reasons, but I found the second but not the first in my /home/user/ path.
And then I faced the following conda issue
https://github.com/conda/conda/issues/7980. And I found the solution for me was to add "
source ~/anaconda3/etc/profile.d/conda.sh" in front of "
conda activate ismrmrd_client" in line 433.
After these changes, the error message "conda environment with client not installed" disappeared. But I got the following error message: "bart reco not successful - check gui dump for error message". The error in the GUI was "activate does not accept more than one argument ['ismrmrd_client`, `client.py`, `-c`, `bart_jemris`, `-o`, `gui_reco.h5`, `-G`, `images`, `signals_ismrmrd.h5` ] " which was fast to solve by adding a missing "&&" in line 448 between ',conda_cmd,' and ',client_cmd,' .
Now the image reconstruction server works fine.
Thank you very much for your answer and foremost for all your work and efforts into this very valuable tool.
Cheers
Skander