Specified cast is not valid

Matija,

It looks like the problem is that you have the "Use Local Rainfall?" property of your catchment set to True, but you don't have a local rainfall event selected. In order to resolve the issue please either change the "use local rainfall?" to False if it was done in error or enter the local rainfall event by selecting it from the drop down menu.

You can also find the solution in this wiki technote:

http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/17443.i-get-an-error-message-that-says-an-item-with-the-same-key-has-already-been-added-or-specified-cast-is-not-valid

This issue has also been logged with our development team for a fix in a future release of the software.
 
Regards,
Mark

Matija,

It looks like the problem is that you have the "Use Local Rainfall?" property of your catchment set to True, but you don't have a local rainfall event selected. In order to resolve the issue please either change the "use local rainfall?" to False if it was done in error or enter the local rainfall event by selecting it from the drop down menu.

You can also find the solution in this wiki technote:

http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/17443.i-get-an-error-message-that-says-an-item-with-the-same-key-has-already-been-added-or-specified-cast-is-not-valid

This issue has also been logged with our development team for a fix in a future release of the software.
 
Regards,
Mark