Database driver internal error changed from -768 to -6319

Prior to version 2.20, if an unexpected error occurred in a database driver, the driver could return error -768, which is a real IBM^® Informix^® SQL error that instructs the user to call the IBM support center.

To avoid any mistake, 2.20 database drivers return now the error -6319 if an internal error occurs, which is a Genero Business Development Language specific error message that suggests you to set the FGLSQLDEBUG environment variable to get detailed debug messages.