hallo..
all.. i need some help..
i try to install gcc-c++ using yum and add/remove software
but not succesfull here i post the error msg:

Traceback (most recent call last):
File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 1258, in _get_depends_not_installed
rc, msgs = self.yumbase.buildTransaction()
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 773, in buildTransaction
(rescode, restring) = self.resolveDeps()
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 716, in resolveDeps
CheckDeps, checkinstalls, checkremoves, missing = self._resolveRequires(errors)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 801, in _resolveRequires
thisneeds = self._checkInstall(txmbr)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 873, in _checkInstall
provs = self.tsInfo.getProvides(*req)
File "/usr/lib/python2.6/site-packages/yum/transactioninfo.py", line 473, in getProvides
result.update(self.getNewProvides(name, flag, version))
File "/usr/lib/python2.6/site-packages/yum/transactioninfo.py", line 455, in getNewProvides
for pkg, hits in self.pkgSack.getProvides(name, flag, version).iteritems():
File "/usr/lib/python2.6/site-packages/yum/packageSack.py", line 380, in getProvides
return self._computeAggregateDictResult("getProvides", name, flags, version)
File "/usr/lib/python2.6/site-packages/yum/packageSack.py", line 566, in _computeAggregateDictResult
sackResult = apply(method, args)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 1207, in getProvides
return self._search("provides", name, flags, version)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 45, in newFunc
return func(*args, **kwargs)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 1193, in _search
for pkg in self.searchFiles(name, strict=True):
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 45, in newFunc
return func(*args, **kwargs)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 892, in searchFiles
self.populate(repo, mdtype='filelists')
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 172, in populate
db_fn = repo._retrieveMD(mydbtype)
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 1525, in _retrieveMD
cache=self.http_caching == 'all')
File "/usr/lib/python2.6/site-packages/yum/yumRepo.py", line 808, in _getFile
raise Errors.NoMoreMirrorsRepoError, errstr
NoMoreMirrorsRepoError: failure: repodata/1c66005347d315c2f9cf623f8568c02d1d30445c68d03c566cb516f6980f233b-filelists.sqlite.bz2 from updates: [Errno 256] No more mirrors to try.

Whenever you ask a question please help us help you by telling us what distro, arch, and version you are using(Centos5.4,64bit etc). In this case it would also be helpful to know which version of yum you are running.