This thread is designed to help users that experienced the error message
“Unable to obtain CarMaker license: too many licenses in use (-17)”
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This error message indicates too many open carmaker instances on one machine. The number of possible Carmaker executables that can run simultaneously is defined in your license file: If opened with a standard text editor (please do not try to modify the file!), one can find an entry called “MaxUsers: X”.
Usually, with test licenses and student licenses, this is limited to one carmaker instance, so all Carmaker instances short of one should be closed.
Especially in case of co-simulations (CarMaker for Simulink) or modified executables, it is probable that there are some remaining applications running unnoticed, which is why task manager should also be used to check for any instances.
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