# [Error Issue: Assign: Cannot create an L-value from - Boolean variable

Feedback Activities
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1

used assign activity
Column_check (boolean variable) = False

Error Issue: Assign: Cannot create an L-value from the given expression with property ‘set_Item’ because the target object is null

3

Hi,

Which type is Column_check variable? Is it Dictionary?

Regards,

7

It seems you are using get credentials activity.
you need to assign a variable before get asset like:
Var1= new NetworkCredential(“”,“”,“XYZ”)