9.3.1 SSO Dynamic Resource Creation Fails When 904 BI-Forms Uses 902 Infrastructure on the Same Machine 
(3231685) When you install BI-Forms and Infrastructure on the same computer, URL rewriting doesn't work once Forms has re-directed to DAS. You'll see "FRM-92102: A network error has occurred. The Forms Client has attempted to reestablish its connection to the Server 5 time(s) without success." This only happens if you're running 9.0.4 Forms against a 9.0.2 infrastructure (installed on the same machine) and using Internet Explorer. 

This can affect SSO support in Forms. If a user tries to run Forms with SSO enabled, and connects using an existing Forms configuration, there is no issue. 

However, when a user attempts to run Forms without providing an existing Forms configuration, Forms redirects to DAS to allow the user to dynamically create a resource for this configuration. When this happens, the resource is created properly by DAS but Forms fails to connect after DAS redirects back to the Forms servlet. If the user copies the same URL at that point and runs it in a different browser, there is no issue. This is a one-time issue, and if administrators have correctly created DAS resources, users will never experience this issue. 

Similarly, if you don't have DAS (part of an Infrastructure installation) and BI-Forms installed on the same machine, you won't encounter this issue.