Runtime Error Messages

A

This appendix describes the error messages generated by the Fortran I/O library, signal handler, and operating system.

Note - Only f77 is described in this Appendix. Information on f90 runtime error messages will be added.

Operating System Error Messages

Operating system error messages include system call failures, C library errors, and shell diagnostics. The system call error messages are found in intro(2). System calls made through the Fortran library do not produce error messages directly. The following system routine in the Fortran library calls C library routines which produce an error message:


CALL SYSTEM("rm /") END

The following message is displayed:

rm: / directory

rm: / directory

Signal Handler Error Messages

Before beginning execution of a program, the Fortran library sets up a signal handler (sigdie) for signals that can cause termination of the program. sigdie prints a message that describes the signal, flushes any pending output, and generates a core image and a traceback.

Presently, the only arithmetic exception that produces an error message is the INTEGER*2 division with a denominator of zero. All other arithmetic exceptions are ignored.

A signal handler error example follows, where the subroutine SUB tries to access parameters that are not passed to it:

CALL SUB()

END

SUBROUTINE SUB(I,J,K)

I=J+K

RETURN

END

CALL SUB() END SUBROUTINE SUB(I,J,K) I=J+K RETURN END

The following error message results:

*** Segmentation violation
Illegal instruction (core dumped)

*** Segmentation violation Illegal instruction (core dumped)

I/O Error Messages (f77)

The error messages in this section are generated by the Fortran 77 I/O library. The error numbers are returned in the IOSTAT variable if the ERR return is taken.

For example, the following program tries to do an unformatted write to a file opened for formatted output:

WRITE( 6 ) 1

END

WRITE( 6 ) 1 END

and produces error messages like the following:

sue: [1003] unformatted io not allowed
logical unit 6, named 'stdout'
lately: writing sequential unformatted external IO

sue: [1003] unformatted io not allowed logical unit 6, named 'stdout' lately: writing sequential unformatted external IO

The following error messages are generated. These same messages are also documented at the end of the man page, perror(3f).

If the error number is less than 1000, then it is a system error. See intro (2).

Table A-1 f77 Runtime I/O Messages

Error
Message

1000

error in format
Read the error message output for the location of the error in the format. It can be caused by more than 10 levels of nested parentheses or an extremely long format statement.

1001

illegal unit number
It is illegal to close logical unit 0. Negative unit numbers are not allowed. The upper limit is 231 - 1.

1002

formatted io not allowed
The logical unit was opened for unformatted I/O.

1003

unformatted io not allowed
The logical unit was opened for formatted I/O.

1004

direct io not allowed
The logical unit was opened for sequential access, or the logical record length was specified as 0.

1005

sequential io not allowed
The logical unit was opened for direct access I/O.

1006

can't backspace file
You cannot do a seek on the file associated with the logical unit; therefore, you cannot backspace. The file may be a tty device or a pipe.

1007

off beginning of record
You tried to do a left tab to a position before the beginning of an internal input record.

1008

can't stat file
The system cannot return status information about the file. Perhaps the directory is unreadable.

1009

no * after repeat count
Repeat counts in list-directed I/O must be followed by an * with no blank spaces.

1010

off end of record
A formatted write tried to go beyond the logical end-of-record. An unformatted read or write also causes this

1011

<Not used>

1012

incomprehensible list input
List input has to be as specified in the declaration.

1013

out of free space
The library dynamically creates buffers for internal use. You ran out of memory for them; that is, your program is too big.

1014

unit not connected
The logical unit was not open.

1015

read unexpected character
Certain format conversions cannot tolerate nonnumeric data.

1016

illegal logical input field
logical data must be T or F.

1017

'new' file exists
You tried to open an existing file with status='new'.

1018

can't find 'old' file
You tried to open a nonexistent file with status='old'.

1019

unknown system error
This error should not happen, but..

1020

requires seek ability
Attempted a seek on a file that does not allow it. I/O operation requiring a seek are direct access, sequential unformatted I/O, and tabbing left.

1021

illegal argument
Certain arguments to open and related functions are checked for legitimacy. Often only nondefault forms are checked

1022

negative repeat count
The repeat count for list-directed input must be a positive integer.

1023

illegal operation for unit
Attempted an I/O operation that is not possible for the device associated with the logical unit. You get this error if you try to read past end-of-tape, or end-of-file.

1024

<Not used>

1025

incompatible specifiers in open
Attempted to open a file with the 'new' option and the access='append' option, or some other invalid combination.

1026

illegal input for namelist
A namelist read encountered an invalid data item.

1027

error in FILEOPT parameter
The FILEOPT string in an OPEN statement has bad syntax.

1028

WRITE to readonly file
Attempt to write on a unit that was opened for reading only.

1029

READ from writeonly file
Attempt to read from a unit that was opened for writing only.

Table A-1 `f77` Runtime I/O Messages
Error	Message
`1000`	`error in format` Read the error message output for the location of the error in the format. It can be caused by more than 10 levels of nested parentheses or an extremely long format statement.
`1001`	`illegal unit number` It is illegal to close logical unit 0. Negative unit numbers are not allowed. The upper limit is 231 - 1.
`1002`	`formatted io not allowed` The logical unit was opened for unformatted I/O.
`1003`	`unformatted io not allowed` The logical unit was opened for formatted I/O.
`1004`	`direct io not allowed` The logical unit was opened for sequential access, or the logical record length was specified as 0.
`1005`	`sequential io not allowed` The logical unit was opened for direct access I/O.
`1006`	`can't backspace file` You cannot do a `seek` on the file associated with the logical unit; therefore, you cannot backspace. The file may be a `tty` device or a pipe.
`1007`	`off beginning of record` You tried to do a left tab to a position before the beginning of an internal input record.
`1008`	`can't stat file` The system cannot return status information about the file. Perhaps the directory is unreadable.
`1009`	`no * after repeat count` Repeat counts in list-directed I/O must be followed by an `*` with no blank spaces.
1010	off end of record A formatted write tried to go beyond the logical end-of-record. An unformatted read or write also causes this
1011	<Not used>
1012	incomprehensible list input List input has to be as specified in the declaration.
1013	out of free space The library dynamically creates buffers for internal use. You ran out of memory for them; that is, your program is too big.
1014	unit not connected The logical unit was not open.
1015	read unexpected character Certain format conversions cannot tolerate nonnumeric data.
1016	illegal logical input field `logical` data must be `T` or `F`.
1017	'new' file exists You tried to open an existing file with `status='new'`.
1018	can't find 'old' file You tried to open a nonexistent file with `status='old'`.
1019	unknown system error This error should not happen, but..
1020	requires seek ability Attempted a `seek` on a file that does not allow it. I/O operation requiring a `seek` are direct access, sequential unformatted I/O, and tabbing left.
1021	illegal argument Certain arguments to open and related functions are checked for legitimacy. Often only nondefault forms are checked
1022	negative repeat count The repeat count for list-directed input must be a positive integer.
1023	illegal operation for unit Attempted an I/O operation that is not possible for the device associated with the logical unit. You get this error if you try to read past end-of-tape, or end-of-file.
1024	<Not used>
1025	incompatible specifiers in open Attempted to open a file with the `'new'` option and the `access='append'` option, or some other invalid combination.
1026	illegal input for namelist A namelist read encountered an invalid data item.
1027	error in FILEOPT parameter The `FILEOPT` string in an `OPEN` statement has bad syntax.
1028	WRITE to readonly file Attempt to write on a unit that was opened for reading only.
1029	READ from writeonly file Attempt to read from a unit that was opened for writing only.

I/O Error Messages (f90)

This is a partial list of runtime I/O messages issued by f90 1.2 :

Table A-2 `f90` Runtime I/O Errors
Error	Meaning
1001	Tried to read past end of file
1002	Tried to read an empty file
1003	Tried to read past endfile record
1004	Tried to read past EOF on namelist
1005	Tried to read past internal file EOF
1006	Read past EOR with ADVANCE='NO'
1010	Invalid unit number
1011	Invalid unit number on OPEN
1021	Unit not opened for direct access
1022	Unit not connected to tape
1023	Unit is not connected
1024	Opening too many named files
1025	File is opened with another structure
1026	File is opened by an auxiliary i/o
1027	ACTION= conflicts with file perms
1029	Error on underlying stdio I/O request
1030	Unknown STATUS parameter on OPEN
1031	Unknown ACCESS parameter on OPEN
1032	Unknown FORM parameter on OPEN
1033	Unknown RECL parameter on OPEN
1034	Unknown BLANK parameter on OPEN
1035	Unknown POSITION parameter on OPEN
1037	RECL must be multiple of 8 for pure
1038	Unknown ACTION specifier on OPEN
1039	Unknown DELIM specifier on OPEN
1040	FILE specifier required on OPEN
1041	FILE specifier invalid on OPEN
1042	RECL specifier required on OPEN
1044	BLANK specifier invalid on OPEN
1045	POSITION specifier invalid on OPEN
1047	ASSIGN by file/unit conflict
1048	Unknown PAD specifier on OPEN
1049	DELIM specifier invalid on OPEN
1050	File must exist prior to OPEN
1051	File must not exist prior to OPEN
1052	File is connected to another unit
1053	Unable to position to end of file
1054	Only BLANK can be changed on reopen
1055	File cannot be opened (structure)
1056	File cannot be opened for direct acc.
1058	STATUS=NEW on currently-open-file
1060	Attempt to OPEN standard file wrong
1067	PAD specifier invalid on OPEN
1068	File cannot be opened for unfmtd acc
1069	File cannot be opened for fmtd acc
1070	Unknown STATUS parameter on CLOSE
1071	Invalid STATUS parameter on CLOSE
1072	Increment in implied do is 0.
1079	BACKSPACE requires read permission
1080	Formatted I/O invalid on unformatted
1081	Unformatted I/O invalid on formatted
1082	Direct access I/O invalid on seq.
1083	Sequential I/O invalid on direct acc.
1084	BACKSPACE invalid on direct access
1085	ENDFILE invalid on direct access
1086	REWIND invalid on direct access
1087	Read after write invalid on seq.
1088	Invalid record number (%d)
1090	No read permission
1091	No write permission
1092	File does not support BACKSPACE
1093	File does not support ENDFILE
1094	File does not support REWIND
1095	WRITE or PRINT invalid after ENDFILE
1096	ENDFILE invalid after ENDFILE
1097	Record number does not exist in file
1100	Record number does not exist in file
1117	Infinite loop in format
1118	Literal invalid in input format
1170	Data type mismatch on READ
1171	Data type mismatch on WRITE
1173	Invalid logical input field
1180	Unknown input on list-directed read
1181	Invalid complex on list-directed read
1182	String too long on list-directed read
1190	Invalid character in numeric input
1191	Overflow converting numeric input
1192	Exponent underflow on numeric input
1193	Exponent overflow on numeric input
1194	Blank numeric input field
1201	Tried to read past end of record
1202	Read/wrote too little data
1205	Unable to request more memory space
1208	An I/O statement was already active
1211	Tried to write a too long record
1212	Tried to write beyond internal file
1213	Ptr/alloc array not assoc/alloc'ed
1214	FMT var not allocated or associated
1215	UNIT var not allocated or associated
1216	FMT var or array is zero-sized
1217	Read encountered a malformed record
1220	Internal Fortran library error
1221	Internal error - unknown file struct.
1223	Internal error - unknown data type
1224	Internal error invalid parsed format
1226	Internal error on tape read
1306	First/last character unknown nl read
1307	Unknown input on namelist read
1308	Zero length char in nl for f90
1309	Array section input to f90 nml
1310	Namelist read error
1312	Invalid char passed to namelist rtn.
1313	Namelist variable name too long
1314	Namelist input group name mismatch
1315	Unrecognized namelist variable name
1316	Unable to obtain namelist value
1317	Invalid logical data in namelist read
1318	Invalid complex data in namelist read
1320	Input rec. too long on namelist read
1321	Attempted namelist read beyond array
1322	Namelist not supported for local mem.
1323	Too many namelist elements specified
1324	Unrecognized namelist variable name
1325	Data type mismatch on namelist read
1326	Namelist name is larger than recsize
1327	Double complex illegal for f77 mode
1328	Structures illegal for f77 mode
1329	Bad pre-ampersand character in f90
1330	Direct access file invalid for BUFIO
1331	Formatted file invalid for BUFIO
1332	Start address > end address for BUFIO
1334	Invalid argument to SETPOS
1335	Positioning operation not supported
1338	Mixing BUFIO/READ/WRITE on pure file
1339	Mixing auxiliary and Fortran I/O
1340	Invalid DECODE record length
1341	Invalid ENCODE record length
1342	Invalid number of items for BUFIO
1343	Invalid ADVANCE= specifier on rd/wrt
1344	ADVANCE='NO' requ'd with SIZE=
1345	ADVANCE='NO' requ'd with EOR=
1350	Negative tape block number is invalid
1354	Maximum tape block size exceeded
1355	Invalid combination of parameters
1356	Unrecovered tape error on tape read
1360	Tblmgr routine called with bad args.
1361	Tblmgr routine called with bad NTAB
1362	Tblmgr routine called with bad tab. #
1363	Tblmgr routine called with bad incr.
1370	Read or write of nonbyte-data is inv.
1371	Data conversion routine not loaded
1372	Can't convert this type with f90
1373	I/O not supported for this KIND
1380	Argument list is not valid

Runtime Error Messages

A

Operating System Error Messages

Signal Handler Error Messages

I/O Error Messages (f77)

Table A-1 `f77` Runtime I/O Messages

I/O Error Messages (f90)

Table A-2 `f90` Runtime I/O Errors

Runtime Error Messages

A

Operating System Error Messages

Signal Handler Error Messages

I/O Error Messages (f77)

Table A-1 f77 Runtime I/O Messages

I/O Error Messages (f90)

Table A-2 f90 Runtime I/O Errors

Table A-1 `f77` Runtime I/O Messages

Table A-2 `f90` Runtime I/O Errors