Hello Tony,
As per my understanding you are unable to locate the mapped network drive on MATLAB.
First of all it would be appreciated if you attach the screenshots with such queries as it would help us to understand the actual problem. As you are saying that all other programs apart from MATLAB are able to locate the drive.
Without knowing the actual issue, the first thing you can try is to restart the MATLAB. It would fix the issue in most of the cases. If it is still not fixed, you may try to map the same drive again(For eg if previously you mapped to X, then do it again with Y) and see if the issue still pertains.
