dbbot doesn't work in solaris

Begin with bin/dbbot and dbbot/reader/database_writer.py, especially _init_schema, _create_table_test_runs, and _create_table, then reproduce the command against the supplied XML on Solaris. Compare the failing database path and SQLite behavior with the standalone Python example; done means DbBot creates robot_results.db and imports the run without the disk I/O error.

I'm using Solaris on x86 machine and copy DbBot-master to ~/pkgs.
The version of RF is 2.8.4 and the version of Python is 2.7.2

I go to the folder ~/pkgs/DbBot-master/bin and execute the command ./dbbot ~/yqleng_20140309_225128_output.xml (This file is generated by pybot. Please get it in the attachment.)

Then there is some error returned as below:
Traceback (most recent call last):
File "./dbbot", line 52, in
DbBot().run()
File "./dbbot", line 32, in init
self._db = DatabaseWriter(database_path, verbose_stream)
File "/home/users/yqleng/pkgs/DbBot-master/dbbot/reader/database_writer.py", line 21, in init
self._init_schema()
File "/home/users/yqleng/pkgs/DbBot-master/dbbot/reader/database_writer.py", line 25, in _init_schema
self._create_table_test_runs()
File "/home/users/yqleng/pkgs/DbBot-master/dbbot/reader/database_writer.py", line 46, in _create_table_test_runs
}, ('hash',))
File "/home/users/yqleng/pkgs/DbBot-master/dbbot/reader/database_writer.py", line 161, in _create_table
self._connection.execute(sql_statement)
sqlite3.OperationalError: disk I/O error.

Please note:
I tried the same SQL in python as below and it works:

import sqlite3
con=sqlite3.connect("./file.db")
cur=con.cursor()
cur.execute("CREATE TABLE IF NOT EXISTS test_runs (id INTEGER PRIMARY KEY, started_at DATETIME, finished_at DATETIME, source_file TEXT, hash TEXT NOT NULL, imported_at DATETIME NOT NULL, CONSTRAINT unique_test_runs UNIQUE (hash))")
<sqlite3.Cursor object at 0x28c160>

I also tried in Window7 and dbbot worked well and generated the file robot_results.db.