VI crashes labVIEW on opening

[Strokes]

Every time I open my top-level vi, labview crashes with the following error "LabVIEW 10.0 Development System has stopped working" and it prompts me to close labVIEW.

My top-level vi contains an event structure and state machine and several sub vi's. It was working fine up until a sudden crash after I was wiring a local variable... and now it won't open at all.

Is there anyway to restore a vi like this or will I have to start again from scratch? 

[Ray.R]

Did you keep a copy of your code?  (probably not since you are asking this question).

Post your VI and maybe someone can open it and save it as something else for you to open. 

Or someone from NI could have a look at it and determine if it can be restored.

Unfortunately, your chances are probably slim....  You may have to recode it from scratch.

[Strokes]

VI is attached below, needless to say I didn't back it up... Not holding out much hope.

Can anyone open it?

[Ray.R]

It also crashes here..  It does appear that you will have to re-write that code.

This is the additional info that I get:  (which might be useful for NI technical reps)

Problem signature:
  Problem Event Name:    BEX
  Application Name:    LabVIEW.exe
  Application Version:    10.0.0.4032
  Application Timestamp:    4c24f059
  Fault Module Name:    MSVCR90.dll
  Fault Module Version:    9.0.30729.4926
  Fault Module Timestamp:    4a1743c1
  Exception Offset:    0006c955
  Exception Code:    c0000417
  Exception Data:    00000000
  OS Version:    6.1.7600.2.0.0.256.48
  Locale ID:    4105
  Additional Information 1:    fc2e
  Additional Information 2:    fc2eb9461110ed47c27fa1bcf0458bdd
  Additional Information 3:    385a
  Additional Information 4:    385af58d949838c925c5fcab426afda1

[Strokes]

Thanks for trying, looks like it's back to square one. Lesson learned...

[Ray.R]

Yes...  We all learn that lesson...

Always backup your code..

You might be lucky iof there is a saved previous version that you could restore.

Just open LabVIEW and see if it proposes to restore older VI's.

Backup your code first..

[smercurio_fc]

I was able to open with LV 2011 beta and back-save it. See if it works...

[Strokes]

I'm still new to labVIEW (hence the failure to back-up vi).

How can I open labVIEW 2011 vi in labVIEW 10.0 (which is the version i'm running), I thought on opening the vi it would convert it automatically..?

Thanks very much for your help.

[smercurio_fc · Accepted solution]

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@Strokes wrote:

I'm still new to labVIEW (hence the failure to back-up vi).

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Being new to LabVIEW and having a good backup strategy are mutually exclusive.  Look into using a source code control system.

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How can I open labVIEW 2011 vi in labVIEW 10.0 (which is the version i'm running), I thought on opening the vi it would convert it automatically..?

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You can't. VIs saved in a newer version of LabVIEW cannot be open in an older version. That's why we have the Downconvert Requests Thread. A newer version of LabVIEW will open VIs written in an older version (up to a certain point) and convert them. If the VI is too old, then we have the Upconvert Requests Thread.

I actually uploaded the wrong version. Attached is the LV 10.0 version. Sorry about that.

[Strokes]

Nope, stil crashing... I guess I'm out of options other than to start again?

Thanks for the assistance regardless.