Error -2147467259 occurred at NI_Database_API.lvlib:DB Tools Open Connec (String).vi

[S.Neo]

I am using MySQL, I have been retrieving data from this database for the past few months and there was no issue. Suddenly this keeps popping out. 

I am running 32bit labview 2012 with ODBC 32bit connector. Could there be something wrong with the structure of my programme?