You need to use \\ or / instead of \.

Hi adrpo,

Thanks for your quick reply! Unfortunately, it still doesnt work. Can you think of any other error when using this command? Btw. it says when checking that my class has 0 equations and 1 variable.

Thanks
lwinklmann

Can you post your full model? Otherwise is hard to guess what is wrong.
If the model is not public, you can send it to us at OpenModelica @ ida.liu.se and we will delete it after finding the issue.

Sure! It was only a model for testing the Modelic.Utilities library. It only consists of that one command that i wrote before. My full model is:

model test2
String[:] file_content= Modelica.Utilities.Streams.readFile("C:/01_Data/Lukas/Hoehenverstellung/WriteBackData.txt");
end test2;

Also i double checked, the path i used is correct.