Not allowed while '%1' is using the database

Error constant SQLE_MUST_BE_ONLY_CONNECTION
ODBC 2 State 40001
ODBC 3 State 40001
Parameter 1 Name of the connection that is using the database.
Severity 16
SQLCODE –211
SQLSTATE 42W19
Sybase error code 13652
Probable cause

You attempted a data definition language operation that cannot be completed while another user is connected.