NullPoinerException clicking on parallel computing toolbox

Matlab 2017b I have an java exception error:

at com.mathworks.toolbox.distcomp.ui.model.ParallelSettings.convertDoubleToInt(ParallelSettings.java:290) at com.mathworks.toolbox.distcomp.ui.model.ParallelSettings.getFactoryIdleTimeout(ParallelSettings.java:188)

Before I had an error with getPreferredNumWorkers and solved it by defining PreferredNumWorkers setting in parallel.settings file in client section. What is the name of the parameter needed in this situation?

here is my parallel.settins contents

version="1.0" encoding="UTF-8"? name="parallel" xmlns="urn:mathworks.matlab.settings" xsi:schemaLocation="urn:mathworks.matlab.settings settings.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="client" name="ConfigurationsLastUpgradeTime" undef="true" /double /key name="DefaultProfile" string value<![CDATA[local]]></value> /string /key name="gui" visible="true" name="IndicatorTooltipDetailLevel" visible="true" string value<![CDATA[VERBOSE]]></value> /string /key /settings name="pool" name="AutoCreate" bool value>1</value /bool /key name="IdleTimeout" Note that this timeout is in minutes. -- double value>30.0</value /double /key <key name="FactoryIdleTimeout"> Note that this timeout is in minutes. -- double value>30.0</value /double /key name="PreferredNumWorkers" double<value>12.0</value> /double /key

            <key name="RestartOnClusterChange">
                <bool>
                    <value>1</value>
                </bool>
            </key>
            <key name="RestartOnPreferredNumWorkersChange">
                <bool>
                    <value>1</value>
                </bool>
            </key>
        </settings>
    </settings>
    <settings name="internal">
        <settings name="profilesWithReadOnlyAlias">
            <key name="MATLABParallelCloud" visible="true">
                <bool undef="true">
                </bool>
            </key>
            <key name="local" visible="true">
                <bool undef="true">
                </bool>
            </key>
        </settings>
        <settings name="profilesWithReadOnlySched">
            <key name="MATLABParallelCloud" visible="true">
                <bool undef="true">
                </bool>
            </key>
            <key name="local" visible="true">
                <bool undef="true">
                </bool>
            </key>
        </settings>
        <settings name="schedulerComponentsWithReadOnlyAlias">
            <key name="MATLABParallelCloudSchedulerComponent" visible="true">
                <bool undef="true">
                </bool>
            </key>
            <key name="localSchedulerComponent" visible="true">
                <bool undef="true">
                </bool>
            </key>
        </settings>
    </settings>
    <settings name="profiles">
        <settings name="parallel" visible="true">
            <key name="Alias" visible="true">
                <string>
                </string>
            </key>
            <key name="Description" visible="true">
                <string>
                </string>
            </key>
            <key name="ProjectComponent" visible="true" anytype="true">
            </key>
            <key name="SchedulerComponent" visible="true">
                <string>
                </string>
            </key>
        </settings>
    </settings>
    <settings name="projectcomponents">
    </settings>
    <settings name="schedulercomponents">
        <settings name="Cloud" visible="true">
            <settings name="MATLABParallelCloudSchedulerComponent" visible="true">
                <key name="Alias" visible="true">
                    <string>
                        <value><![CDATA[MATLABParallelCloudSchedulerComponent]]></value>
                    </string>
                </key>
                <key name="AllowClone" visible="true">
                    <bool undef="true">
                    </bool>
                </key>
                <key name="LicenseNumber" visible="true" anytype="true">
                </key>
                <key name="MaxNumMachines" visible="true" anytype="true">
                </key>
                <key name="NumThreads" visible="true" anytype="true">
                </key>
                <key name="ShutdownDelay" visible="true" anytype="true">
                </key>
                <key name="ShutdownEvent" visible="true" anytype="true">
                </key>
            </settings>
        </settings>
        <settings name="Generic" visible="true">
            <settings name="parallelSchedulerComponent" visible="true">
                <key name="AdditionalProperties" visible="true" anytype="true">
                </key>
                <key name="Alias" visible="true">
                    <string>
                    </string>
                </key>
                <key name="ClusterMatlabRoot" visible="true">
                    <string>
                    </string>
                </key>
                <key name="HasSharedFilesystem" visible="true">
                    <bool>
                    </bool>
                </key>
                <key name="IntegrationScriptsLocation" visible="true">
                    <string>
                    </string>
                </key>
                <key name="JobStorageLocation" visible="true">
                    <string minArraySize="0" maxArraySize="0" undef="true">
                    </string>
                </key>
                <key name="LicenseNumber" visible="true" anytype="true">
                </key>
                <key name="NumThreads" visible="true">
                    <double undef="true">
                    </double>
                </key>
                <key name="NumWorkers" visible="true">
                    <double undef="true">
                    </double>
                </key>
                <key name="OperatingSystem" visible="true">
                    <string>
                    </string>
                </key>
                <key name="RequiresMathWorksHostedLicensing" visible="true">
                    <bool>
                    </bool>
                </key>
            </settings>
        </settings>
        <settings name="GenericR2016b" visible="true">
        </settings>
        <settings name="HPCServer" visible="true">
        </settings>
        <settings name="LSF" visible="true">
        </settings>
        <settings name="Local" visible="true">
            <settings name="localSchedulerComponent" visible="true">
                <key name="Alias" visible="true">
                    <string>
                        <value><![CDATA[localSchedulerComponent]]></value>
                    </string>
                </key>
                <key name="JobStorageLocation" visible="true">
                    <string minArraySize="0" maxArraySize="0" undef="true">
                    </string>
                </key>
                <key name="NumThreads" visible="true" anytype="true">
        </key>

                <key name="NumWorkers" visible="true" anytype="true">
                </key>
            </settings>
        </settings>
        <settings name="MJS" visible="true">
        </settings>
        <settings name="MJSComputeCloud" visible="true">
        </settings>
        <settings name="PBSPro" visible="true">
        </settings>
        <settings name="Torque" visible="true">
        </settings>
    </settings>
    <settings name="version" visible="true">
        <key name="PCTVersionNumber" visible="true">
            <double>
            </double>
        </key>
    </settings>
</settings>