Hi Alexander
As per my understanding you are receiving the following warning message.
To suppress the warning message while using ‘tcpclient’ and the ‘readline’ function, MATLAB's warning management functions can be used.
For this, the first step is to find the warning identifier for the specific warning that needs to be suppressed. This can be done as follows.
w = warning('query', 'last');
By executing these commands, the warning is disabled which can be seen here.
If we want the warning to be re-enabled, it can be done as follows
I hope this helps.