SYMPTOM:
The error: "The conversion of a varchar data type to a datetime data type resulted in an out-of-range value." appears during different circumstances such as running reports, configuring the Strategy Intelligence Server or populating the Narrowcast Server Object Repository when using a SQL Server database. The performed operation will stop with this error and the user cannot proceed.

In the DSSErrors log the following may be found:
Execute Query failed. Error type: Odbc error. Odbc operation attempted: SQLExecDirect. The conversion of a varchar data type to a datetime data type resulted in an out-of-range value.

What it should be changed to depends on the specific environment, but a thumb-rule is to change it to either English or the local language (i.e. German in Germany) depending on what the setting was to begin with.
Article Reference Number: KB426657
KB426657