IllegalArgumentException when trying to edit expression using Expression Builder -------------------------------------------------------------------------------- Key: TEIIDDES-2391 URL: https://issues.jboss.org/browse/TEIIDDES-2391 Project: Teiid Designer Issue Type: Bug Components: Transformations Affects Versions: 8.6 Reporter: Andrej Šmigala Assignee: Barry LaFond Fix For: 8.6.1, 9.0.1, 9.0 Attachments: log When opening the expression builder with cursor positioned in an existing expression (other than a simple constant or column reference), the following error is logged multiple times: {quote}java.lang.IllegalArgumentException: Expected argument to be non-null but got null{quote} (relevant part of log attached) After that, the expression builder behaves in unpredictable way (values do not update etc)