Oracle-Error: opiodr aborting process unknown ospid ( ) as a result of ORA-609

Background: After shutdown and restarted the oracle instance by an executive, client can’t connect to database instance though database is up and running and listener service is up. OS: Windows Server 2012 x64, Oracle: 11g R2, Data Guard Configured Workaround: From the alert_SID.log file found the below error raised after shutdown and consecutive startup and when…

MS Access Error: 3162: “You tried to assign the Null value to a variable that is not a Variant data type.”

Background: All of a sudden importing data from spreadsheet in a form produced the above error(it was tested and worked fine over two weeks), the same operation in another form is executing fine. This is bit frustrating when everything seems fine, no errors in logic or elsewhere but things are not working. Solution: Digging down further…