IBM Mainframe blocked "X NOT HERE"

Question

When make an entry not in the enabled places on the screen, Mainframe gets blocked with the error message "X NOT HERE" and requires a reset. Is there any setting which removes the need for blocking? Thanks P. IBM Mainframe error message

Answer 1

3270 is a block oriented interface that allows the programmer to define fields that are transferred to the mainframe when a key called an Attention Identifer (AID) is pressed. This can be an enter, pa1, clear or other AID type.

As such, the screen is presented with content that includes Text as well as fields. Like a browser presents data as text and also allows for data entry fields. Like a browser, you cannot type in a read-only area. Only in areas that are defined for input.

As such, this really depends on the application you are using. TSO generally is presented using a program called ISPF which uses 3270 to present information. Some is read-only, others are read-write.

There is no way to generically do "unblocking" as it is based on what the application is presenting. What you mention as "restart" I think is really the reset key.

Another reference that would be useful for IBM's emulator is here.

For more information on programming 3270 devices I would refer to this page as a starting point.

Answer 2

In the same time I have found the solution I was looking for. In BlueZone: Options -> Keyboard -> Options (again) -> Auto-Reset when Keyboard is locked. Thanks a lot all. BR