Writing good error messages

Agenda

DSSServerDispatcher. error dispatching request -1. err = 0x800436F8.
The object with the given identifier is not an object of the expected type.
Index out of range
Item not found in this collection. Container ID: %1, Object ID: %2.
Form (1) is not included on the template.
Skipping broken internal reference
Object Second Class has already been deleted or is in an invalid state.
Invalid Expression.
Index out of range in method 'LeanCollection::ItemNS'

Invalid Expression.
Error detected while parsing expression for derived attribute: Specifying the sorting direction (Asc or Desc) is not allowed for dynamic sorting.

Failed to connect to data source. Error message: Connect failed. {Error type: Odbc error. Odbc operation attempted: SQLDriverConnect. [HY000:98: on SQLHANDLE] [MicroStrategy][ODBC Salesforce driver][Salesforce]java.io.FileNotFoundException: /opt/mstr/MicroStrategy/IntelligenceServer/svcappin.config (No such file or directory) Connection String: DSN=SalesForce_PROD;UID=svcappin@microstrategy.com;. }
Failed to connect to data source. {Error type: Odbc error. Odbc operation attempted: SQLDriverConnect. ...}

QueryEngine::RunSQLParallelWrapper, retry: 3, Action: 22, CubeID: 3DF3BD6011E8267D7A150080EF1594ED, Match:false
Server encountered an error when executing SQLs in parallel. Details for trouble shooting: {QueryEngine::RunSQLParallelWrapper, retry: 3, Action: 22, CubeID: 3DF3BD6011E8267D7A150080EF1594ED, Match:false}

curl_easy_perform failed. Error Code: 7.
Failed to connect to host or proxy. Please check your network connection to 'XXX'. Details for trouble shooting: {curl_easy_perform failed. Error Code: 7.}