Keysight Technologies N7700 User Manual page 59

Automation 4
Using automation commands it is possible to start a new measurement
NOTE
engine as well as connect to an existing one, for example, one started
from the Keysight Client GUI.
Certain automation operations, such as the Write method of the OMRFile
interface or the FileSave method of the IEngine interface, lock the
measurement object while accessing it. This might cause temporary
failures in automation operations that are triggered from other instances
connected to the same N7700 engine server.
This might especially be the case when using engine automation in
addition to running the Keysight Client, which locks the OMRFile object
in memory while updating measurement data in the GUI right after a
measurement and when performing any automatic history save (see
on page 42 to learn how to disable automatic
Automatic History Saves
saves).
To deal with this behavior, either implement retries or delays on affected
operations or avoid connecting multiple instances to the same
measurement engine server.
Keysight N7700 Photonic Application Suite, Fast Spectral Loss Engine, User's Guide 59