A network.lic-file has to be placed within the application folder \ licenses, in my case: C:\Program Files\MATLAB\R2012a\licenses http://www.mathworks.nl/support/solutions/en/data/1-63ZIR6/index.html This license-file has the following format SERVER server_name hostid port# USE_SERVER http://www.mathworks.nl/support/solutions/en/data/1-99R6CN/index.html?solution=1-99R6CN where servername and host id can be found on the Flexlm Licenses Detail Website (Server: @ ) The host id seems to be the volume serial number of the C:\ drive (in cmd:> "vol c:" Volumeseriennummer (without the dash ) http://www.mathworks.nl/support/solutions/en/data/1-171PI/