|Fortran User's Guide|
Runtime Error Messages
This appendix describes the error messages generated by the Fortran I/O library, signal handler, and operating system.
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
Fortranlibrary do not produce error messages directly. The following system routine in the
Fortranlibrary calls C library routines which produce an error message:
CALL SYSTEM("rm /")END
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.
sigdieprints 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*2division with a denominator of zero. All other arithmetic exceptions are ignored.
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
IOSTATvariable if the
ERRreturn is taken.
The following error messages are generated. These same messages are also documented at the end of the man page
If the error number is less than 1000, then it is a system error. See
f77Runtime I/O Messages
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.
illegal unit number
It is illegal to close logical unit 0. Negative unit numbers are not allowed. The upper limit is 231 - 1.
formatted io not allowed
The logical unit was opened for unformatted I/O.
unformatted io not allowed
The logical unit was opened for formatted I/O.
direct io not allowed
The logical unit was opened for sequential access, or the logical record length was specified as 0.
sequential io not allowed
The logical unit was opened for direct access I/O.
can't backspace file
You cannot do a
seekon the file associated with the logical unit; therefore, you cannot backspace. The file may be a
ttydevice or a pipe.
off beginning of record
You tried to do a left tab to a position before the beginning of an internal input record.
can't stat file
The system cannot return status information about the file. Perhaps the directory is unreadable.
no * after repeat count
Repeat counts in list-directed I/O must be followed by an
*with no blank spaces.
off end of recordA formatted write tried to go beyond the logical end-of-record. An unformatted read or write also causes this
1011 <Not used>
incomprehensible list inputList input has to be as specified in the declaration.
out of free spaceThe library dynamically creates buffers for internal use. You ran out of memory for them; that is, your program is too big.
unit not connectedThe logical unit was not open.
read unexpected characterCertain format conversions cannot tolerate nonnumeric data.
illegal logical input fieldlogical data must be T or F.
'new' file existsYou tried to open an existing file with status='new'.
can't find 'old' fileYou tried to open a nonexistent file with status='old'.
unknown system errorThis error should not happen, but..
requires seek abilityAttempted a
seekon a file that does not allow it. I/O operation requiring a
seekare direct access, sequential unformatted I/O, and tabbing left.
illegal argumentCertain arguments to open and related functions are checked for legitimacy. Often only nondefault forms are checked
negative repeat countThe repeat count for list-directed input must be a positive integer.
illegal operation for unitAttempted 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>
incompatible specifiers in openAttempted to open a file with the 'new' option and the access='append' option, or some other invalid combination.
illegal input for namelistA namelist read encountered an invalid data item.
error in FILEOPT parameterThe
FILEOPTstring in an
OPENstatement has bad syntax.
WRITE to readonly fileAttempt to write on a unit that was opened for reading only.
READ from writeonly fileAttempt to read from a unit that was opened for writing only.
overflow converting numeric inputInteger input data is too large for the corresponding input variable
exponent overflow on numeric inputThe floating-point input data is too large to be represented by the corresponding input variable.
I/O Error Messages (f95)
These are the runtime I/O messages issued by
f95Runtime I/O Messages
1000 format error 1001 illegal unit number 1002 formatted I/O on unformatted unit 1003 unformatted I/O on formatted unit 1004 direct-access I/O on sequential-access unit 1005 sequential-access I/O on direct-access unit 1006 device does not support BACKSPACE 1007 off beginning of record 1008 can't stat file 1009 no * after repeat count 1010 record too long 1011 truncation failed 1012 incomprehensible list input 1013 out of free space 1014 unit not connected 1015 read unexpected character 1016 illegal logical input field 1017 `new' file exists 1018 can't find `old' file 1019 unknown system error 1020 requires seek ability 1021 illegal argument 1022 negative repeat count 1023 illegal operation for channel or device 1024 reentrant I/O 1025 incompatible specifiers in open 1026 illegal input for namelist 1027 error in FILEOPT parameter 1028 writing not allowed 1029 reading not allowed 1030 integer overflow on input 1031 floating-point overflow on input 1032 floating-point underflow on input 1051 default input unit closed 1052 default output unit closed 1053 direct-access READ from unconnected unit 1054 direct-access WRITE to unconnected unit 1055 unassociated internal unit 1056 null reference to internal unit 1057 empty internal file 1058 list-directed I/O on unformatted unit 1059 namelist I/O on unformatted unit 1060 tried to write past end of internal file 1061 unassociated ADVANCE specifier 1062 ADVANCE specifier is not `YES' or `NO' 1063 EOR specifier present for advancing input 1064 SIZE specifier present for advancing input 1065 negative or zero record number 1066 record not in file 1067 corrupted format 1068 unassociated input variable 1069 more I/O-list items than data edit descriptors 1070 zero stride in subscript triplet 1071 zero step in implied DO-loop 1072 negative field width 1073 zero-width field 1074 character string edit descriptor reached on input 1075 Hollerith edit descriptor reached on input 1076 no digits found in digit string 1077 no digits found in exponent 1078 scale factor out of range 1079 digit equals or exceeds radix 1080 unexpected character in integer field 1081 unexpected character in real field 1082 unexpected character in logical field 1083 unexpected character in integer value 1084 unexpected character in real value 1085 unexpected character in complex value 1086 unexpected character in logical value 1087 unexpected character in character value 1088 unexpected character before NAMELIST group name 1089 NAMELIST group name does not match the name in the program 1090 unexpected character in NAMELIST item 1091 unmatched parenthesis in NAMELIST item name 1092 variable not in NAMELIST group 1093 too many subscripts in NAMELIST object name 1094 not enough subscripts in NAMELIST object name 1095 zero stride in NAMELIST object name 1096 empty section subscript in NAMELIST object name 1097 subscript out of bounds in NAMELIST object name 1098 empty substring in NAMELIST object name 1099 substring out of range in NAMELIST object name 1100 unexpected component name in NAMELIST object name 1111 unassociated ACCESS specifier 1112 unassociated ACTION specifier 1113 unassociated BINARY specifier 1114 unassociated BLANK specifier 1115 unassociated DELIM specifier 1116 unassociated DIRECT specifier 1117 unassociated FILE specifier 1118 unassociated FMT specifier 1119 unassociated FORM specifier 1120 unassociated FORMATTED specifier 1121 unassociated NAME specifier 1122 unassociated PAD specifier 1123 unassociated POSITION specifier 1124 unassociated READ specifier 1125 unassociated READWRITE specifier 1126 unassociated SEQUENTIAL specifier 1127 unassociated STATUS specifier 1128 unassociated UNFORMATTED specifier 1129 unassociated WRITE specifier 1130 zero length file name 1131 ACCESS specifier is not `SEQUENTIAL' or `DIRECT' 1132 ACTION specifier is not `READ', `WRITE' or `READWRITE' 1133 BLANK specifier is not `ZERO' or `NULL' 1134 DELIM specifier is not `APOSTROPHE', `QUOTE', or `NONE' 1135 unexpected FORM specifier 1136 PAD specifier is not `YES' or `NO' 1137 POSITION specifier is not `APPEND', `ASIS', or `REWIND' 1138 RECL specifier is zero or negative 1139 no record length specified for direct-access file 1140 unexpected STATUS specifier 1141 status is specified and not `OLD' for connected unit 1142 STATUS specifier is not `KEEP' or `DELETE' 1143 status `KEEP' specified for a scratch file 1144 impossible status value 1145 a file name has been specified for a scratch file 1146 attempting to open a unit that is being read from or written to 1147 attempting to close a unit that is being read from or written to 1148 attempting to open a directory 1149 status is `OLD' and the file is a dangling symbolic link 1150 status is `NEW' and the file is a symbolic link 1151 no free scratch file names 1161 device does not support REWIND 1162 read permission required for BACKSPACE 1163 BACKSPACE on direct-access unit 1164 BACKSPACE on binary unit 1165 end-of-file seen while backspacing 1166 write permission required for ENDFILE 1167 ENDFILE on direct-access unit 1181 attempting to allocate an allocated array 1182 deallocating an unassociated pointer 1183 deallocating an unallocated allocatable array 1184 deallocating an allocatable array through a pointer 1185 deallocating an object not allocated by an ALLOCATE statement 1186 deallocating a part of an object 1187 deallocating a larger object than was allocated 1191 unallocated array passed to array intrinsic function 1192 illegal rank 1193 small source size 1194 zero array size 1195 negative elements in shape 1196 illegal kind 1197 nonconformable array 2001 invalid constant, structure, or component name 2002 handle not created 2003 character argument too short 2004 array argument too long or too short 2005 end of file, record, or directory stream
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