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 1313: exception error nn : <exception type>, code = nnnnh
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 This message indicates that a protection exception of the specified type has
 occurred during the execution of the program. This is an application program
 error not a DOS extender error, and indicates that the application program
 has attempted an unauthorised operation.

 The exception types and a brief description of their causes are listed
 below. The numeric code will often indicate the value causing the error, for
 example an invalid selector being loaded into a segment register or a
 pointer beyond the end of a segment.

 This error message will be followed by a dump of all the processor registers
 and various other status information. Analysis of this information is
 covered in more detail in the `General protection fault (GPF) analysis'
 section of the online help.

 Exception 00: divide by zero attempted

 This exception is generated by an attempt to divide a value by zero, and is
 normally handled by the compiler run time library when a high level language
 is being used.

 Exception 05: bounds check failed

 This exception is generated by a BOUND instruction when the value to be
 tested is less than the indicated lower bound or greater than the indicated
 upper bound.

 Exception 06: undefined opcode

 This exception is generated by an attempt to execute an opcode which is not
 defined for the processor the program is being run on.

 Exception 07: no maths coprocessor available

 This exception is generated by an attempt to execute a floating point
 instruction when the processor has no maths coprocessor available.

 Exception 08: double exception fault

 This exception is generated when multiple exceptions occur on one
 instruction, or an exception occurs in an exception handler.

 Exception 0a: invalid task switch state segment

 This exception is generated by an attempt to task switch to a segment with
 an invalid task state segment.

 Exception 0c: stack overflow / underflow

 This exception is generated by a limit violation in any operation which
 refers to the stack segment. This includes stack-oriented instructions such
 as PUSH and POP as well as other memory references which implicitly use the
 stack such as MOV AX,[BP].

 Exception 0d: general protection fault

 All protection violations which do not cause another exception cause a
 general protection exception. These include exceeding segment limits,
 attempting to load invalid selectors into segment registers, attempting to
 execute data and attempting to write to code.

 This is the most common type of protected mode run time error message, and
 is described in more detail in the `General protection fault (GPF) analysis'
 section of the online help.

 Exception 0e: page fault

 This exception is generated by an attempt to load a segment to an invalid
 memory address.