Sometimes "-" shown on the UI of the DUX business Application. What does "-" mean?
The "-" shown on DUX UI is also a bar whose dimension can't be plotted and is an expected behavior from product.
To plot the bar system calculate the execution duration and based on which it plots the bar dimensions. Note that execution duration shown on DUX UI spans for 24 Hours and hence mini-scale runs bars with hard to plot dimensions can't be plotted on hour columns, hence "-" is shown .
In the cases where the execution is very small i.e. run completed in seconds or less, the system cannot plot these mini-scale dimension for bar and hence shows "-". if you mouse over to this it will show respective status same as that for bar.
Keystone Job status where system is able to plot the bars: