If you could open the same Family Tree in two Gramps at once, it is likely your data would be damaged.
{{-}}In the unlikely event of a crash of Gramps, the family tree will be left in a locked state. To unlock the tree:{{-}}[[File:Database_is_locked.jpg|thumb|right|380px|Fig. {{#var:chapter}}.{{#vardefineecho:figure|{{#expr:{{#var:figure}}+1}}}} Database is locked ]]* If Gramps has been set to open a tree automatically on startup, select then you will see the 'Database is locked' dialogue. Click on the {{man button|Close}} button and the {{man label|Family Tree Manager}} will appear. Choose the locked family tree, and then click the {{man button|Break lockLoad Family Tree}} button that . The 'Break the lock' dialogue will be available. Only do this if you are sure no other copy of Gramps is using this Family Treeappear.{{-}}
[[File:Break-the-lock-on-the-database-Dialog-41.png|thumb|right|380px|Fig. {{#var:chapter}}.{{#vardefineecho:figure|{{#expr:{{#var:figure}}+1}}}} Break the lock on the "Family Tree Example" database? - Dialog ]]
* Click the {{man button|Break lock}} button that will be available. Only do this if you are sure no other copy of Gramps is using this Family Tree.
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