Unable to complete your request. The following exception occurred: (TypeError) in Guided Decision Table Graph ------------------------------------------------------------------------------------------------------------- Key: DROOLS-2371 URL: https://issues.jboss.org/browse/DROOLS-2371 Project: Drools Issue Type: Bug Components: Guided Decision Table Editor Affects Versions: 7.6.0.Final Environment: FireFox ESR 52.3.0 (64-bit) Reporter: Michael Anstis Assignee: Michael Anstis Priority: Critical Labels: support An Error pops up if we open the same Guided Decision Table both in Guided Decision Table Editor and Guided Decision Table Graph (without closing the Editors by "x" button). The error message has 2 variants. {noformat} Unable to complete your request. The following exception occurred: (TypeError) : a is null. {noformat} {noformat} Unable to complete your request. The following exception occurred: (TypeError) : Cannot read property 'I' of null. {noformat} See attached screen shots (TypeError01.png, TypeError02.png). If I close the popup, I can continue using decision-central. See "Steps to Reproduce" for detailed steps.