Cursor List Property - error 1077

Hello
I'm trying to programatically create cursors in the Waveform Graph. I want to have as many cursors as plots in the graph. See the attached VI. And now the weird thing: when I decrement number of plots, everything is OK - plots are shown, cursors are created. But when I increment them - I get "Error 1077 - Invalid property value." from the Cursor List Property Node.
So the typical question: is it me or LabVIEW doing it wrong?
Attachments:
CursorList.vi ‏29 KB

Thanks to your reply, TiTou, I've came with another workaround - if you put wait (for example 10 ms) into the sequence struct on my VI's front panel, it works. And this lead me tothe best solution yet - update graph using Value property:
This leads to interesting conclusion regarding updating controls using terminal or property node. It seems that update through terminal is the quickest method, but it doesnt work immediately - the graph didn't know about the data update right after the cable reached the terminal! When you use Value property node, you can be sure that everything is updated when the flow leave the node.
Any comments from NI about this?
Attachments:
cursors.png ‏39 KB

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