Symptom: As a dimension gets large attempting to Save the dimension in the Modeler fails. There are no errors in the dimension, but the save fails. A large dimension would normally start to fail at something over 10,000 members, but this can vary with the number of properties, the size of properties, and the actual volume of all the member entries.

Cause: IIS has a default limit on the maximum size of each request to a web service. The default maximum is 4 mega bytes. This limit can be increased with an entry in the web.config file in the Web_Service folder. The entry required is the “maxRequestLength” parameter to the “httpRuntime” node (see example below). The “maxRequestLength” specifies the maximum request size in kb, so the following example increases the maximum request size to 400 mega bytes.

web.config file contents:

<?xml version="1.0" encoding="UTF-8"?>
		<httpRuntime maxRequestLength="409600" />
		<trust level="Full" />
		<authentication mode="Windows" />
		<identity impersonate="true" />