How to fix the Oracle error PRCN-02068: Failed to check the port availability?

How to fix the Oracle error TNS-12234: TNS:Redirect to destination?

Win32 COM Error – FVE_E_NOT_ALLOWED_TO_UPGRADE_WHILE_CONVERTING – 0x803100B3

Hydra Error 143 ISAM error: deadlock detected.

How to handle Null Column values of SQLDataReader in C# ?

InterSystems IRIS General Error Code – 602

InterSystems IRIS General Error Code – 5591

InterSystems IRIS TSQL Code 137 Must declare the variable ‘%.*ls’.

InterSystems IRIS TSQL Code 2502 Could not start transaction.

InterSystems IRIS TSQL Code 4701 Could not truncate table ‘%.*ls’ because

InterSystems IRIS System Error Code – MAXSCOPE There has been an attempt to i

SQL Server Error Code – 3211 %d percent processed.