Created attachment 113676 [details]
Empty HSQLDB database file

On latest LO release (4.4.0.3, Win7 64bit, Oracle Java 1.7.75), LO Base freezes when starting the report design wizard. I first tried to create a report for a PostgreSQL database connected via JDBC. Creating and executing a query worked fine, but creating a report for that query failed, no matter if i went via the context menu of the query or via the report button at the left.

Then, i simply created a new internal HSQLDB db, saved it, and started the report wizard - LO freezes.

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To reproduce:
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1. Start LO Base;
2. On the database wizard, select "Create a new database" - Embedded database - HSQLDB Embedded (the default value); click "Next";
3. On the next step, register the DB (doesn't matter - LO will freeze with an unregistered db, too...) and select "Open the database for editing"
4. Click Finish and save the odb file;
5. Now, on the LO Base GUI, select "Reports" from the left (under "Database");
6. On the "Tasks" area, select "Use wizard to Create report".
7. LO freezes.

I'll add an empty HSQLDB database file for testing.