Text engines change from version to version. It is expected behavior for text to reflow when you open an older version file in a newer version and begin to edit.
Your message is a bit confusing, though, since you said you you were opeing CS3 files in CS3....
@GIRI_RAGHU – Did you intall newer packages of CS or CC recently?
Maybe the fonts are not exactly the same versions anymore?
(The names are the same, also the vendor, but…)
Did you check the exact version number of the fonts? (Maybe this is impossible right now, because you never stored the old font's version numbers to the point before).
Perhaps the files were created in a prelease version? And are you certain they are really CS3 files.
You can check the file history from the advanced About InDesign dialog. On Windows, hold down the Ctrl key while selecting About InDesign from the Help menu. On Mac hold down the Cmd key and make the same selection from the InDesign menu.
May memory on this one may be a bit clouded but I don’t think a CS3 prerelease file would open in the final release software. That changed somewhere along the line but I’m not sure where.
The document history is definitely the best bet but I would also be looking for the Re: Text is reflowed in InDesign CS3 "[converted]" in the file name when opened.
I have no idea why that happened. I typed in the word converted in brackets as it would appear in the file name if you opened a file from an earlier version of InDesign. I guess I should edit that.
@GIRI_RAGHU – hmm, what else can force a reflow of text?
If you edit the document in certain ways. E.g. if you add or remove text. Or if you apply an object with text wrap. But the reflow should only affect certain paragraphs and not the whole text composition. Unless you are using variable text that is trying to update or if you create or update a table of contents.
AND: the old composition stems from an older InDesign CS version (CS2 or below), opened and saved unchanged (not edited) with CS3.
Other reasons? I'm out in the dark…
Updating the version to a newer bug fix version than before? Yes. That could be.
Adding more features through 3rd party plug-ins? Yes. We can consider this as well…
Thanks for the replies.
I have done 2010-first edition, and 2011-second edition reprint corrections (there is no issue), and now I am doing 2014-third edition - reprint corrections, but this time the reflow issue is happen.
The document is InDesign CS3 and not earlier version, document are properly packaged and I have not used third party plug-ins (since customer is not allowed).
Only one mismatch in Document History the Mac OS used in 2010 and 2011 is 10.5, but now I am working in 10.6.8.