Solution: Set the c:/twiki directory to be in CygWin binary mode, by mounting it onto /twiki in the Cygwin system, and configure TWiki.cfg to use /twiki, as described in WindowsInstallCookbook.

Symptom: Diffs output is blank

When the RCS files were not in binmode, any editing of the existing TWiki topics, e.g. WebHome, would create a usable .txt file, and update the RCS file, but the rdiff script used for the Diffs and '>' links would not work.

In fact, every edit of an existing topic would end up corrupting the RCS file by adding CR characters, resulting in the following message in the Apache error log (e.g. c:/apache/logs/error_log) - these messages actually indicate a corrupt RCS .txt,v file:

[Fri Feb 22 20:47:19 2002] [error] [client 127.0.0.1] co: c:/twiki/data/Know/WebPreferences.txt,v:103: edit script
                                                      refers to line past end of file
[Fri Feb 22 20:47:19 2002] [error] [client 127.0.0.1] co aborted
[Fri Feb 22 20:47:19 2002] [error] [client 127.0.0.1] rcsdiff: c:/twiki/data/Know/WebPreferences.txt,v: co failed

Symptom: Blank lines added on every Edit

This can be seen by re-editing a topic - on every edit new blank lines are seen, due to extra CRs being added. This is just another symptom of this problem (assuming you have ruled out specific browser issues that required a TWiki patch, but these did not affect IE5 or Mozilla).

-- RichardDonkin - 24 Feb 2002