The PLplot Plotting Library: Programmer's Reference Manual
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# In Case of Error

If a fatal error is encountered during execution of a PLplot routine then `plexit` is called. This routine prints an error message, does resource recovery, and then exits. The user may specify an error handler via `plsexit` that gets called before anything else is done, allowing either the user to abort the error termination, or clean up user-specific data structures before exit.

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