ctools

After upgrading ctools, and in case that parameters changed, a use may encounter the following errors:

*** ERROR encounterted in the execution of ctobssim. Run aborted ...
*** ERROR in GApplicationPars::operator[](std::string&): Invalid argument. Parameter "maxrate" has not been found in parameter file.
Please specify a valid parameter name.

and

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/data0/gamma/bin/lib/python2.7/site-packages/gammalib/app.py", line 337, in __getitem__
    return _app.GApplication___getitem__(self, name)
RuntimeError: *** ERROR in GApplicationPars::operator[](std::string&): Invalid argument. Parameter "maxrate" has not been found in parameter file.
Please specify a valid parameter name.

Either make sure that any update will clean up the parameter files (for the moment this is only done upon initialising the package using the init script) or document the problem at least under the Known Problems section (or the installation section).