LaunchKernels fails

Hi all

Recently I have a problem that for some unknown reason, maybe I terminated parallel calculation abruptly, LaunchKernels fails and shows the following messages:

In[1]:= LaunchKernels[]

ReplaceAll::reps:
{Null, Version → 3.01, CVSRevision → 1.36,
LocalStatus → Hold[{<<4>>}, <<4>>, {<<4>>}], <<15>>,
ParallelPalettepaletteConfig[Local Kernels, Batch] → {},
debugPreference[Batch] → False} is neither a list of replacement rules nor
a valid dispatch table, and so cannot be used for replacing.

ReplaceAll::reps:
{Null, Version → 3.01, CVSRevision → 1.36,
LocalStatus → Hold[{tr[LocalPro<<16>>elName], <<3>>}, <<5>>], <<15>>,
paletteConfig[Local Kernels, Batch] → {}, debugPreference[Batch] → False}
is neither a list of replacement rules nor a valid dispatch table, and so
cannot be used for replacing.

Throw::nocatch: Uncaught Throw[Parallel`Preferences`Private`nopref[Version],
Preferences] returned to top level.

Out[1]= Hold[Throw[Parallel`Preferences`Private`nopref[Version], Preferences]]

How to fixed this problem under Linux? The Mathematica version is 9.0

SIncerely
Meng-Chieh Ling

Delete the ApplicationData/Parallel/Preferences directory under your $UserBaseDirectory – typically it is ~/.Mathematica on Linux.

Hi

Thanks, it works out.