Problems in Editing a huge file

Problems in Editing a huge file

We recently faced an abend in our production cycle and it was due to a bad record in the file. We had to edit few records in the file after taking the backup but the file was really huge.

When we tried to open the file in edit mode, it did not open in edit mode instead it was openning in browse mode only.

I did not understand what was the problem but I was able to open other small files in edit mode, it appeared this problem is with huge files only. We somehow managed by sorting the file in batch but I would have saved some time if I was able to open the file in edit mode.

Can some one provide an idea what could be the issue and hw to get around it?

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