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Interactively changing values to table problem: indicator and control table, and why it does not work after a while...?

I have been producing a VI that loads a set of data and displays it in a table: A table control is initialised with an empty variable, the loaded data takes the place of the variable and fills the table, while some headers are added. That table feeds an intensity graph to give a pictorial impression of the data.
With this scheme, a user can change any value of the table, and the changes are interactively reflected on the graph.
Problem: after few saving of the VI, the access to the table doesn't work anymore. It is the same with all my numerical controls in the VI where it should be possible to enter a value.
If anybody has an idea on the potential
causes of these problem, I would be really grateful as it is very useful...when it works !

Regards,

Elie Allouis
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I can not image what is causing the error. Would you be willing to post some code to see if we can reproduce the problem?

Jeremy7
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