{{tag>Known_Issues, Issue:References Issue:UNDEFINED}}
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==== Undefined With Multiple References ====
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<col sm="5">===Problem/Limitation Description===
Checking for ''UNDEFINED'' value of a multiple reference attribute (see [[docs:2000_concepts:0200_basics:0400_reference_attributes|Reference Attributes]]) in queries does not work correctly. For example, the following will not work:<code aim>FIND Account WHERE Account.Transactions IS UNDEFINED </code>
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<col sm="5">===Work Around===
Use ''EXISTS'' or ''COUNT'' expressions, for example<code aim>FIND Account WHERE COUNT Transaction WHERE (Transaction IN Account.Transactions) = 0 </code>

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