can't do parallel computing

hello everybody,

I have a problem with parallel computing. I can't open matlabpool. When I type matlabpool 6, I got the following.

Can somebody take a look? Thanks in advance.

Warning: Unable to read the required metadata file
 /home/r/.matlab/local_cluster_jobs/R2012a/matlab_metadata.mat

> In distcomp.filestorage.pSetStorageLocation at 117
  In distcomp.abstractstorage.abstractstorage at 12
  In distcomp.filestorage.filestorage at 50
  In CJSCluster>CJSCluster.CJSCluster at 332
  In Local.Local>Local.Local at 257
  In parcluster at 51
  In ProfileConfigHelper>ProfileConfigHelper.buildScheduler at 76
  In MatlabpoolHelper>MatlabpoolHelper.parseMatlabpoolInputs at 220
  In MatlabpoolHelper>MatlabpoolHelper.parseInputsAndCheckOutputsForFunction at 100
  In matlabpool at 130 
stopped.
Error using matlabpool (line 144)
Failed to open matlabpool. (For information in addition to the causing error, validate the profile
'local' in the Cluster Profile Manager.)

Caused by:
    Error using distcomp.interactiveclient/start (line 61)
    Failed to locate and destroy old interactive jobs.
    This is caused by:
    The storage metadata file does not exist or is corrupt

Answer 1

[Jason Ross]

• Take a look in that directory and see if the file is there.
• Check the permissions on the directory and the file to make sure you can read and write there.
• Move the file aside (e.g. mv matlab_metadata.mat matlab_metadata.mat.old) and try to open matlabpool again. You might see a warning like "file is missing ... re-creating it")
• Running validation might tell you more.

Answer 2

[Leo Lin]

great! it works now. thank you so much, Jason!

I moved the file aside, and ran parallel validation.

[Jason Ross]

No problem!