Troubleshooting : System Architect XT error messages and problems : Unable to expand definition tree in updater mode
  
Unable to expand definition tree in updater mode
Possible cause: A definition name contains a vertical bar |
All the encyclopedia data is stored in a database table named Entity. Use the following SQL command to display the contents of the Entity table and to list the names that contain a vertical bar.
1 Select * from entity where name like %|%.
2 Rename the definitions that contain a vertical bar.
3 Update the Table Name and set the Column Name= 'desired name' with the where condition.
For example, to rename a Definition Name such as Test|Application, use this command syntax:
Update Table Name set Column Name= 'TestApplication' where Name='Test|Application'
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System Architect XT error messages and problems