Failed to set property "%1!s!" on "%2!s!". The property could not be set for an unknown reason.

Community Notes

Examples of this error can be seen when calling SetComponentProperty method of CManagedComponentWrapper, such as when building the Data Flow programmatically. Causes for this are usually simple mistakes when programming for example:

• Property name passed into SetComponentProperty incorrect.
• Component is incorrect. Check the Count of IDTSComponentMetaData90.CustomPropertyCollection.
• Forgot to call ProvideComponentProperties, which will create the properties you intend to set. Until this is called the IDTSComponentMetaData90.CustomPropertyCollection will be empty.

 ...
 IDTSComponentMetaData90 component = dataFlow.ComponentMetaDataCollection.New();
 component.ComponentClassID = "...";
 instance = topTransform.Instantiate();
 instance.ProvideComponentProperties();
 CManagedComponentWrapper instance = instance.ProvideComponentProperties();
 instance.SetComponentProperty("Rows", rows);
 ...

ComponentErrorCodes