Error and exception handling routines

The routines described in this section fall into two main categories:

Those that allow interpretation of error codes returned by other routines. Routines which fall into this category include ERR77 and DOS_ERROR_MESSAGE@. Where a routine returns an error code it is of course always good practice to check it for an acceptable value (usually zero).
Those that allow control over the action taken in the event of a software-generated exception. Exception handling routines in this section are currently for Win32 only. For information on handling .NET exceptions see Handling exceptions.

ACCESS_DETAILS@	Gets details of the access violation.
CLEAR_FLT_UNDERFLOW@	Clears a floating point underflow exception.
DOS_ERROR_MESSAGE@	Gets a DOS error message.
DOSERR@	Prints a DOS error message when an error occurs.
ERR77	Prints a DOS error message and terminate a program when an error occurs.
ERROR@	Prints a user defined error message and terminate a program.
EXCEPTION_ADDRESS@	Finds the address of the instruction that generated the exception.
FORTRAN_ERROR_MESSAGE@	Gets a Fortran error message.
GET_VIRTUAL_COMMON_INFO@	Gets virtual common block details.
JUMP@	Executes a non-local jump.
LABEL@	Sets a label for a non-local jump.
PERMIT_UNDERFLOW@	Switches off floating point underflow checking.
PRERR@	Prints the error message associated with a given error code.
QUIT_CLEANUP@	Prints a message and exit from a program with Control-break.
RESTORE_DEFAULT_HANDLER@	Removes a user defined exception handler.
RUNERR@	Prints the run-time error corresponding to a given IOSTAT value.
SET_DISK_ERRORS@	Controls the critical event handler.
SET_TRAP@	Traps a given event.
TRAP_EXCEPTION@	Installs a user defined exception handler.
UNDERFLOW_COUNT@	Gets the number of floating point underflows.