Why am I unable to set a video input object's TimerFcn property when the object is running?

Why am I unable to set a video input object's TimerFcn property when the object is running in a version of MATLAB prior to R2006a?

If you start a video input object with an empty TimerFcn property, and set the value of the property while the object is running, the new TimerFcn is never used, even though the TimerFcn property is not classified as read-only while running.

Answer 1

[MathWorks Support Team]

This is a known limitation of the Image Acquisition Toolbox in versions of MATLAB prior to R2006a. As of R2006a, the TimerFcn property can now be modified at any time and the changes will take effect on the next scheduled execution of the TimerFcn property.

Additionally the TimerPeriod property has been changed so that it can also be set when the object is running. Previously, the TimerPeriod property was not modifiable while the object was running.