SCROLLING cursor on SCORE EDITOR dissapeared

Hello,
I have lost the scrolling vertical line in the SCORE EDITOR that indicates the time position in the written music. Autoscroll in ON but suddenly this scrolling line does not appear in the score as usual.
I hace search in option and configuration but there is no setting for this.
This is very usefull.
Any help is appreciatted.

THANKS IN ADVANCE