# Incorrect empty string check

Check ID	MF_0002
Category	Quality
Summary	It is common when creating microflows to check for empty strings. The recommended way of checking for an empty string is using the Community Commons IsEmptyString or IsNotEmptyString rule. If this doesn't meet your needs (because you need to perform additional logic in a decision), you need to be careful to check strings in the correct way otherwise it is possible to generate a runtime exception by accessing an empty variable.
Options	This check does not have any options.
Pass	Your microflow doesn't contain any checks for empty strings that might throw a null pointer exception, or produce an incorrect output (= check for empty string returns true while the string is actually empty).
Fail	Your microflow contains a checks for an empty string that might throw a null pointer exception, or produce an incorrect output (= check for empty string returns true while the string is actually empty).