Today I needed to install PEAR again on my machine and was surprised when it failed to install PEAR itself. I have the latest PHP4 installed v4.4.4 if someone can explain me the error message cause I didn’t understand it : Loading zlib: ok Using local package: PEAR-stable……ok Using local package: Archive_Tar-stable….ok Using local package: Console_Getopt-stable….ok Using local package: XML_RPC-stable….ok Bootstrapping: PEAR……………….(remote) ViewVC Exception An Exception Has Occurred Python Traceback Traceback (most recent call last): File “/usr/local/viewvc-1.1-dev/lib/viewvc.py”, line 3623, in main request.run_viewvc() File “/usr/local/viewvc-1.1-dev/lib/viewvc.py”, line 388, in run_viewvc self.view_func(self) File “/usr/local/viewvc-1.1-dev/lib/viewvc.py”, line 2122, in view_checkout fp, revision = request.repos.openfile(path, rev) File “/usr/local/viewvc-1.1-dev/lib/vclib/bincvs/__init__.py”, line 134, in op enfile filename, revision = _parse_co_header(fp) File “/usr/local/viewvc-1.1-dev/lib/vclib/bincvs/__init__.py”, line 549, in _p arse_co_header raise COMalformedOutput, “Unable to find revision in co output stream” COMalformedOutput: Unable to find revision in co output stream ok The solution was go-pear , without the www. Download the latest version available on server and update then install again. It should work fine, I was just wondering why all other packages installed correctly except the main PEAR package ?