The property VALUE of my thing just hides itself

[Jamal8548]

I have attached a screenshot in this post. Please have a look at it. The value of one of my property just goes away and contains no value. Its really strange behaviour. Does anyone knows whats an issue here?? It just goes away after few days and i have set it again always..

[Sathishkumar_C · Accepted solution]

Make sure the property is persistent (Persist = TRUE).

[Jamal8548]

Thanks @Sathishkumar_C ! The problem is resolved. 

My next question is do you know that 

How to store the state of variable in thingworx functions?

Is there any way that i can store the state of this parameter in expression. I dont have anything to bind it from my mashup. So in the screenshot you can see that i have bool which has default value true and i just want it to change every time i use this function. For example I change the state to false then again next time i evaluate i turn it into true.

[DanZ]

You can simply add a invisible checkbox to the mashup and bind the state of it as input and output to your expression.

[Jamal8548]

thank you! i  just did it already with this approach.