CODEWITHSUNDEEP
gccfortrangfortran
TTT
TTT

Reputation: 4434

gfortran open statement does not support blocksize?

I am new to FORTRAN and try to re-compile some .F90 codes in a WIN7 64-bit system with gfortan 4.5.2. The source code has been successfully compiled using LAHEY compiler, which I do not have access... My question is related to the blocksize option in the open statement, which is:

open (unit=RANUNT, file=trim(DAFile_Name), status='old',&
    action='readwrite', recl=LENREC, access='direct',&         
    form='UNformatted', blocksize=LENREC, iostat=It_is_OK)

The error message I got is

    form='UNformatted', blocksize=LENREC, iostat=It_is_OK) 
                       1
Error: Syntax error in OPEN statement at (1)

So my question: Is this blocksize option not supported in gfortran? What potential problems I could run into by removing it?

Thanks!

Update

The program works fine in Windows XP compatibility mode. However, it complained in Windows 7 mode. The error I got in Windows 7 are:

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  6f61143e
#1  6f68ec2f
#2  00401261

Upvotes: 0

Views: 1510

Answers (1)

M. S. B.
M. S. B.

Reputation: 29391

"blocksize" keyword of an open statement is not standard Fortran. You should have no problems by omitting it. It is an instruction to the OS to write to the output device in groups of bytes. Modern hardware (are you writing to a disk?) has builtin sophisticated buffering.

Upvotes: 1

Related Questions