Error -- Block Diagram is Completely Black

[bchan]

Hello,

I've been working on a relatively complicated .vi that has a good amount of case structures and flat sequences.  As I was testing the front panel and going back and forth between the block diagram, the block diagram became entirely black -- all I see is a black background -- no wires, blocks, etc.  I am still able to add blocks through the menu but can't actually see them being placed or anything.  Is there a way to fix this, or revert back to normal?  I would really not like to redo all this work...

Thanks,

Bryan 

[bchan]

I am able to run the .vi operate it using the front panel as if nothing is wrong,  I'm just unable to edit the block diagram.

 I just Ctrl+A'd the block diagram and pasted onto a new .vi -- block diagram is back to viewble/normal!  

[altenbach]

I think there are some unusal observations of you exceed a certain diagram size ( e.g. 16000 (?) in pixels). How big is your diagram?

(Other possibilites are issues with your video card, graphics driver, or color depth setting of the OS.)

[Studento]

It must be hardware problem. your problem looks interesting though.

[bchan]

The diagram was pretty big -- there was an errant label at the very bottom.  Dimensions were about 16000 x 1000.  Made it much smaller (about 2000 x 1000), so hopefully there won't be any issues like this any time soon.  Also if anyone was wondering, restarting LabVIEW or my computer did not solve the problem...the only thing I could figure out was to ctrl+A and copy everything to another .vi.

Thanks.

[dkfire]

You are aware of that it is possible for you to make subvi's?

That will help you reduce the size of the block diagram for you vi's.

What is a good amount of case structures and flat sequences? 

Use of Flat sequences diagram screams of insufficient use of dataflow.

[Yamaeda]

A good amount of case structures and flat sequences is 0-2 and 0-1 respectively (in a single .vi). 😉

(there's exceptions to every rule, but if you need more, you probably need more sub vi's)

/Y