H2 database "Error while renaming file" when updating a table

I'm using the latest version of H2, i.e. version 1.3.150 and I get a org.h2.jdbc.JdbcSQLException when updating a VARCHAR2.

• The SQL statement is a very simple

  UPDATE STAMP_TABLE SET DESCRIPTION='a bit of text' WHERE STAMPID='s/1'

• and The table itself has nothing special, just a bunch of VARCHAR2 and a BLOB

• It works the first time round and fails the second time with the error message:

  Error while renaming file "C:\my\local\path\1.t6.lob.db" to "C:\my\local\path\1.temp.lob.db"

• the method that uses the SQL statement is below:

  public void updateStampDescription(StampId stampId, String description) throws SQLException {
  
      PreparedStatement stmt = null;
  
      try {
  
          stmt = conn.prepareStatement(UPDATE_STAMP_DESCRIPTION);
          stmt.setString(1, description);
          stmt.setSt开发者_运维问答ring(2, stampId.getId());
  
          logger.debug("SQL statement: " + stmt.toString());
  
          stmt.execute();
  
      }
      catch(SQLException ex){
          logger.error("Error while updating table " + STAMPS_TABLE_NAME + ", description column: " + ex.getMessage() );
          ex.printStackTrace();
          throw ex;
      }
      finally {
          if(stmt!=null) stmt.close(); // Also closes the ResultSet
      }
  
  }
  

Any idea what's wrong ?

I'll answer my own question:

Actually, the project was sitting on a Dropbox folder and the files were being used by Dropbox at the time, and hence could not be renamed as H2 wanted.