Unable to get length of string

[sienna28]

I'm trying to check if a string variable has a value in it.
The check is done when the loop has finished.

The empty check is

empty(variables('<FoundNotFound>'))

I am getting an error of
The inputs of workflow run action 'Condition_2' of type 'If' are not valid. The variable '<FoundNotFound>' must be initialized before it can be used inside action 'Condition_2'.'

Any help appreciated

[ScottShearer · Accepted solution]

@sienna28 

Try entering true in the expression window.  It looks like you just entered true as text - you must enter it in the expression widow for it to be considered as the true constant rather than just plain text.

In addition, there is an issue with your expression - I will post a suggestion in a moment,

[sienna28]

Thanks for the tip.

I am still getting the error though.

[ScottShearer]

@sienna28 

The error is complaining that the variable hasn't been initialized - I assume that you have an initialize variable action at the top of your Flow and before the condition - am I correct?

[sienna28]

I just have it right at the top of the flow.

I thought that would be enough.

It won't allow it to go before the condition - only at the top level.

[ScottShearer]

@sienna28 

So, the initialize variable action is before the condition where you reference the variable - correct?

[sienna28]

The initialise is the first thing that happens in the flow.

I am surprised it is not being picked up further in the flow.

[sienna28]

Solved it.

It did not like 
empty(variables('<FoundNotFound>'))

so I used a length statement around it.

[ScottShearer]

@sienna28 

Don't know why - I tested and had no issues....

[sienna28]

It depends where you have it placed.

Where I had it was not acceptable, but anyway I've solved it.