ORA-20100: Error: FND_FILE failure. Unable to create file, o0040178.tmp in thedirectory, /usr/tmp.

This error only occurs on custom forms whereas it does not throw any error for standard forms.

I checked the form related AOL objects as below.

Responsibility: Order Management Super User

Error Message: APP-FND-00828: Please enter the required context field value in the items flexfield. The context field (also Known as a structure field) appears as one of the first segments in your flexfield.

Possible solution: could be an error associated with Descriptive Flexfield

Navigate to System Administrator responsibility.

Application>> Flexfield>> Descriptive>> Segments

This kind of error usually occurs when Menu and Request Group are not properly set to a responsibility.

Navigate to System administrator responsibility

Security>> Responsibility>> Define

There are many changes in the default behaviour from Oracle 9i and Oracle 10g databases. One of the changes to SQLNet was the default timeout for a new connection to be established. This setting is called SQLNET.INBOUND_CONNECT_TIMEOUT.

The value in 9i was unlimited and the new value in 10g is 60 seconds. In reality, I don’t think that many applications should take 60 seconds to establish a connection to the database – I think you’d have complaints before you received this error from a genuine application.

There are several reasons why you may hit this timeout:

Oracle Application R12

When you login Oracle Application R12 have an error that

" Error “FRM-92050 : Failed to connect to the Server: /forms/lservlet-1” "

1. Internet --> Tools --> Internet Options
Security TAB --> Trusted Sites and click Custom level

3. Restart .