Thank you for your efforts. The explain operation works as it should. But I can not retrieve data through Koha, catmandu and MarcEdit. I have tried these three ways, but neither has worked. I am not 100% sure, that I choose the right options and parameters, nevertheless I had success with other SRU servers sooner or later. Unfortunately I have no clue or idea where the problem might lie with thr Swissbib SRU.
swissbib-unibas
commented
6 years ago 
mail from community
Thank you for your efforts. The explain operation works as it should. But I can not retrieve data through Koha, catmandu and MarcEdit. I have tried these three ways, but neither has worked. I am not 100% sure, that I choose the right options and parameters, nevertheless I had success with other SRU servers sooner or later. Unfortunately I have no clue or idea where the problem might lie with thr Swissbib SRU.