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else ... Open(28,file='',form='formatted',err=450,iostat= & ierr) Then to actually do the checks, you should write something like this: 450 print *, 'Error detected. A "unit" can be the screen (unit=6) or any open file. "Write" is a more flexible command. sta is a character expression.

When using scratch files, you can use the TMPDIR environment variable to specify where the scratch file gets created (see Section 7.4.2). This is the default. no 87 Invalid NAMELIST input value found in internal file. A positive value indicates a serious problem, but the precise meaning associated with a given number is system dependent and defined in the specific compiler manual.

A value of zero means no error. The default value is READWRITE. no 95 Invalid repeat specifier for list-directed or NAMELIST input in internal file. For example: STATUS='OLD'. 'NEW' -- The file doesn't exist (existence is an error).

When I/O is to a file you must ASSOCIATE a UNIT number (which you choose) with the FILENAME. The file is usually in the current working directory, or in TMPDIR if that environment variable is set. On the ERR and IOSTAT specifiers, see Chapter 8. IOSTAT=ios The IOSTAT=ios clause is optional.

To prevent deletion, CLOSE with STATUS='KEEP'. Hot Network Questions Did Sputnik 1 have attitude control? direct access requires recl recl=10) Send comments on this topic. ©2004 Lahey Computer Systems, Inc. unit number NAME=fnm !

If you want to avoid aborting the program when an error occurs on an OPEN, include ERR=s or IOSTAT=ios. Example 1: Open a file and connect it to unit 8--either of the following forms of the OPEN statement opens the file, projectA/data.test, and connects it to FORTRAN unit 8: OPEN(UNIT=8, ERR=label GOTO label if an error occurs opening the file. Why can't I do ls -a 1>&-?

no 97 Invalid decimal digit found in input. If you specify a file specification that does match the one specified for the original open, the file is reconnected without the internal equivalent of the CLOSE and OPEN. Note - For tape I/O, use the TOPEN() routines. Select seams easy and fast way?

Defaults to 'NONE'. ACTION or READONLY 1 indicates whether statements will be used to only read records, only write records, or both read and write records. yes 41 Valid logical input not found in external file. The FORMAT statement is defined only once (for each label referenced) in the program but may be used by any number of I/O statements.

Use any unit number other than 5 and 6. It is YES if the formatted input record is to be padded with blanks and NO otherwise. Next, is the 'OLD' statement. k = 2 refers to the operating system read error "type"=2. 8.

If the program aborts, then the file may not be deleted. Possible values are 'ZERO' and 'NULL'. 'ZERO'--Blanks are treated as zeroes. 'NULL'--Blanks are ignored during numeric conversion. One byte if the -vms option was specified. The blnk is a character expression that indicates how blanks are treated.

Table 7-4 lists the DIGITAL Fortran 90 environment variables and the standard I/O file associations for the preconnected files. READ(unit#, format, options) item1, item2,... RECL=rl The RECL=rl clause is required if ACCESS='DIRECT' and ignored otherwise. When considering very large record sizes, also consider limiting factors like system virtual memory.

A complete file specification consists of a file name usually preceded by a pathname that specifies a directory. The READ statement causes the program to PAUSE and allow you to enter values. k = -1 means EOF was encountered. In the last example, if an error occurrs, control passes to the statement labelled 10 and the variable specified as ios will return a positive, system dependent integer.