Keysight Technologies N7700 User Manual page 86

5 Troubleshooting
The list of values for a drop-down control appears invisible or displaced
COM API registration fails
86
Possible Reason
Different scaling factors for the different
screens in some multi-screen setups.
The engine window is maximized.
Possible Reason
MATLAB Compiler Runtime (MCR) has not
been installed prior to measurement engine
installation.
A troubleshooting utility called Get N7700 System Information has been
NOTE
introduced to help Keysight technical support gather some vital details
required to resolve problems with the software at the user end, engine
startup problems, for instance. This utility is accessible from the Start
menu and should be run to capture information that can be shared with
Keysight technical support.
Keysight N7700 Photonic Application Suite, Fast Spectral Loss Engine, User's Guide
Solution
Ensure that the scaling factor for all the
screens is consistent.
Consider using a single screen setup, define
another screen as the default screen, or start
the engine from an Explorer window on the
screen that the engine GUI is intended to show
on.
To make the invisible list of values appear on
the screen, restore the window to its normal
size ensuring that it is not too close to the top
left edge of the screen. Then set the required
value in the drop-down control. Note that the
list of values will still appear displaced.
If the list of values is visible (although
displaced), select the drop-down list and use
the cursor (arrow) and Enter keys to navigate
to and select the required value.
Solution
Register the COM API after later MCR
installation or re-register for any other
reasons, by running the Re-register all N7700
COM APIs program from the Start menu.