file	slatec/j4save.f
for	save or recall variables required for error handling

file	slatec/s88fmt.f
for	return character string of an integer

file	slatec/xerabt.f
for	print error message and abort execution

file	slatec/xerctl.f
for	user control over error handling

file	slatec/xerprt.f
for	print error message

file	slatec/xerror.f
for	process diagnostic message with control

file	slatec/xerrwv.f
for	process diagnostic message with control, print integer variables

file	slatec/xersav.f
for	record an error message

file	slatec/xgetua.f
for	determine unit numbers for error messages

