“org.w3c.dom.Is.LSException:文件提前结束”

[Caiqn23]

[GCAM 7.1 release]
After runing GCAM, I got a folder named "database_basexdb" in the output folder. However, I couldn't open this db document with DBopen in the Modelinterface, which remind me that "org.w3c.dom.Is.LSException:文件提前结束". I have already prepared the Java environment. What's wrong and what should I do?