QGIS » SEXTANTE

first bug report, please bear with me.

issue:
can not use ftools dissolve through qgis python console.

querying Sextante.alghelp("ftools:dissolve") returns TypeError: cannot concatenate 'str' and 'NoneType' objects.

system:
windows 7
sextante r319

======

Sextante.alghelp("ftools:dissolve")
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-43-8eba2529d7db> in <module>()
----> 1 Sextante.alghelp("ftools:dissolve")

C:\Users\richard\.qgis\python\plugins\sextante\core\Sextante.py in alghelp(name)
242 alg = Sextante.getAlgorithm(name)
243 if alg != None:
--> 244 print(str(alg))
245 else:
246 print "Algorithm not found"

C:\Users\richard\.qgis\python\plugins\sextante\core\GeoAlgorithm.py in str(self)
215 s = "ALGORITHM: " + self.name + "\n"
216 for param in self.parameters:
--> 217 s+=("\t" + str(param) + "\n")
218 for out in self.outputs:
219 if not out.hidden:

C:\Users\richard\.qgis\python\plugins\sextante\parameters\ParameterTableField.py in str(self)
32
33 def str(self):
---> 34 return self.name + " <" + self.__module__.split(".")[-1] +" from " + self.value + ">"

TypeError: cannot concatenate 'str' and 'NoneType' objects