Open Source Document Management System | OpenKM

I re-arraged my directory structure under "My documents" in OpenKM and now whenever I try to access a particular folder under "My documents" I get the following error:

"Error when communicating with server (GetDocumentChilds)"

If I login as Admin I am able to see the folder contents, but only for a while, then I get the error message.

I am using version 6.3 CE.

Any help would be appreciated.

I see the following in the tomcat/logs/catalina.log file:

2015-01-05 01:54:50,611 [http-bio-0.0.0.0-8080-exec-10] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/OpenKM]- Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.util.List com.openkm.frontend.client.service.OKMDocumentService.getChilds(java.lang.String,java.util.Map) thr
ows com.openkm.frontend.client.OKMException' threw an unexpected exception: java.lang.OutOfMemoryError: Java heap space

Any help would be appreciated.

What amount of memory do you got in your server ?
Write here your setenv.bat ( it's into folder $TOMCAT_HOME/bin/ )
Finally do you know how many document do you got into that folder ?