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arungr · Beginner Joined: 12 Feb 2005 Posts: 16 Topics: 4

Dear All,

I encountered a situation in my program in which I have to open files(PS) which may vary from 1 to 50 in number. While closing the files , how do I know that this file is opened or not because I could have opened any number of files.Since I will get an abend if I try to close a file which is not opened, is there any method to find if this file is opened or close?

Thanks,

arun.

hari_uss · Posted: Sat Feb 12, 2005 10:40 am Post subject:

The simplest solution would be declaring one flag for each of the files and and setting them ON when you open the respective files.

arungr · Beginner Joined: 12 Feb 2005 Posts: 16 Topics: 4

Thanks. That' s true. But I have to use 50 files to the maximum. It means I have to define 50 flags. Is there any other way?

dtf · Posted: Sat Feb 12, 2005 7:56 pm Post subject:

Never had a clear answer to this, but I think the operating system will in fact close the files if you don't.
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semigeezer · Posted: Sun Feb 13, 2005 1:48 am Post subject:

THe file will be automatically closed, and at least if you are using QSAM and buffers will be flushed. I'm not sure flusing buffers with BSAM and since I don't speak COBOL I don't know how it handles the I/O. But regarding the flags, can't you just use an array (or whatever they call that in COBOL)?

hari_uss · Posted: Mon Feb 14, 2005 4:55 am Post subject:

With BSAM, data management will have no information about the current buffer. So what it might do is, complete if there is any active I/O and then close the dataset.
It would be always advisable to close the files in your program instead of leaving it to OS and take a chance.

Kathi · Posted: Tue Feb 15, 2005 12:44 pm Post subject:

arungr posted