Installation Guide for pc

License Manager Error -88
This error indicates that your system clock has been set incorrectly. Check that 
your system date and time are correct. To learn how to change the system date, 
see “License Manager Error -10: Feature Has Expired” on page 4-9. 
License Manager Error -97: License Checkout Failed 
This error is often caused by trying to run both MATLAB 5.3 and MATLAB 6.1 
on the same system with different license managers. If this is the case, run both 
copies of MATLAB with the same License File. See “Running Multiple Versions 
of MATLAB” on page 3-6 for more information.
If you are not trying to run MATLAB 5.3 but only want to run MATLAB 6.1, 
make sure you have installed FLEXlm version 6.1g from the MATLAB R12.1 
CD. MATLAB 6.1 will not run with an older version of the license manager.

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4 
Troubleshooting a PC Installation
4-14
Troubleshooting an Installation That Uses Dongles
If your MATLAB installation requires the use of dongles, it can potentially run 
into conflicts with other applications you may be running that also use dongles. 
A dongle is a hardware-based security device that attaches to the serial or 
parallel printer port of a desktop computer. It uses embedded codes and 
passwords to control access to software applications.
MATLAB requires a certain set of dongle drivers. You cannot use other dongles 
with MATLAB. Also, if you remove other applications from your computer, 
these applications may delete the MATLAB dongle drivers as well as their own. 
To help troubleshoot problems with dongles, MATLAB includes a utility 
program call 
dongleutil.exe
. The dongle utility program can be used to:
• Determine the version of the currently installed dongle drivers. This 
information is useful to the MathWorks Technical Support.