Assertion failed using parfor

When I use this code I obtain this error:

Error using consume_assign (line 23)
Assertion failed.
Error in parprova>(parfor consume)
Error in parprova (line 16)

This is the code :

parfor iGauss=1:8
    GaussModel=[];regremulti=[];regremulti2=[];
    if not(mod(iGauss,5)==0)
       regremulti=temprenetinputs;
       regremulti(56,1:3130)=tempostnetinputs(iGauss,1:3130);
       [GaussModel, validationAccuracy{iGauss}] = GaussRegrExpZero(regremulti)
       regremulti2(1:55,1:3130)=regremulti(1:55,1:3130);
       yfit{iGauss}=GaussModel.predictFcn(regremulti2);
    else
       yfit{iGauss}=0;
    end
end

I don't saturate the RAM and the 4 workers runs at 80%. Somebody can explain me what's happening?

Answer 1

[Tao Wang]

I encounter a similar issue. Whenever parfor is used, matlab complains that

"Too many input arguments."

Answer 2

[Tao Wang]

seems to me a fairly common use case like openmp, why does matlab not work properly?

Answer 3

[Tao Wang]

Version: matlab R2018a VALIDATION REPORT Profile: local Scheduler Type: Local

Stage: Cluster connection test (parcluster) Status: Passed Start Time: Fri Jul 13 13:09:43 PDT 2018 Finish Time: Fri Jul 13 13:09:43 PDT 2018 Running Duration: 0 min 0 sec Description: Error Report: Command Line Output: Debug Log:

Stage: Job test (createJob) Status: Failed Start Time: Fri Jul 13 13:09:44 PDT 2018 Finish Time: Fri Jul 13 13:09:44 PDT 2018 Running Duration: 0 min 0 sec Description: An unexpected error occurred accessing properties: "AdditionalPaths" "ApiTag" "AttachedFileData" "AttachedFilePaths" "AttachedFiles" "AutoAttachFiles" "AutoAddClientPath" "CreateDateTime" "CreateTime" "DependentFiles" "EnvironmentVariables" "ExecutionMode" "FinishDateTime" "FinishTime" "JobData" "MATLABDrivePathMap" "Name" "NumPathsToAppend" "NumThreads" "ProductKeys" "StartDateTime" "StartTime" "StateEnum" "SubmitDateTime" "SubmitTime" "Tag" "Username" "Version" "JobSchedulerData" Error Report: An unexpected error occurred accessing properties: "AdditionalPaths" "ApiTag" "AttachedFileData" "AttachedFilePaths" "AttachedFiles" "AutoAttachFiles" "AutoAddClientPath" "CreateDateTime" "CreateTime" "DependentFiles" "EnvironmentVariables" "ExecutionMode" "FinishDateTime" "FinishTime" "JobData" "MATLABDrivePathMap" "Name" "NumPathsToAppend" "NumThreads" "ProductKeys" "StartDateTime" "StartTime" "StateEnum" "SubmitDateTime" "SubmitTime" "Tag" "Username" "Version" "JobSchedulerData"

Caused by: Error using assert Too many input arguments. Command Line Output: Debug Log:

Stage: SPMD job test (createCommunicatingJob) Status: Failed Start Time: Fri Jul 13 13:09:44 PDT 2018 Finish Time: Fri Jul 13 13:09:44 PDT 2018 Running Duration: 0 min 0 sec Description: An unexpected error occurred accessing properties: "AdditionalPaths" "ApiTag" "AttachedFileData" "AttachedFilePaths" "AttachedFiles" "AutoAttachFiles" "AutoAddClientPath" "CreateDateTime" "CreateTime" "DependentFiles" "EnvironmentVariables" "ExecutionMode" "FinishDateTime" "FinishTime" "JobData" "MATLABDrivePathMap" "Name" "NumPathsToAppend" "NumThreads" "ProductKeys" "StartDateTime" "StartTime" "StateEnum" "SubmitDateTime" "SubmitTime" "Tag" "Username" "Version" "JobSchedulerData" "MinNumWorkers" "MaxNumWorkers" Error Report: An unexpected error occurred accessing properties: "AdditionalPaths" "ApiTag" "AttachedFileData" "AttachedFilePaths" "AttachedFiles" "AutoAttachFiles" "AutoAddClientPath" "CreateDateTime" "CreateTime" "DependentFiles" "EnvironmentVariables" "ExecutionMode" "FinishDateTime" "FinishTime" "JobData" "MATLABDrivePathMap" "Name" "NumPathsToAppend" "NumThreads" "ProductKeys" "StartDateTime" "StartTime" "StateEnum" "SubmitDateTime" "SubmitTime" "Tag" "Username" "Version" "JobSchedulerData" "MinNumWorkers" "MaxNumWorkers"

Caused by: Error using assert Too many input arguments. Command Line Output: Debug Log:

Stage: Pool job test (createCommunicatingJob) Status: Skipped Start Time: Finish Time: Running Duration: Description: Validation skipped due to previous failure. Error Report: Command Line Output: Debug Log:

Stage: Parallel pool test (parpool) Status: Skipped Start Time: Finish Time: Running Duration: Description: Validation skipped due to previous failure. Error Report: Command Line Output: Debug Log: