IBMCLIFX.DAT contains fixes for the DB2 Call Level Interface component. These fixes are for VisualAge Version 3.0a only. If you have installed one of the Professional products, then you should apply the following fixes that correct problems with LOB support and also allow you to run using threads: ibmdbfx.exe For IBM Database component ibmclifx.exe For IBM CLI Database component odbcfx.exe For ODBC Support component