NullReferenceException: Object reference not set to an instance...
quite often I get the following error during reload of a QlikView document via scheduler:
The task "xyz.qvw" failed. Part of the log file follows:
15.09.2013 20:41:01 Error Exception=System.NullReferenceException: Object reference not set to an instance of an object.
at Wrappers.QVSWrapper.GetPhysicalPath(String documentName)
at QDSMain.DistributeTask.InternalExecute(ILogBucket i_LogBucket, TaskResult currentTaskResult)
at QDSMain.AbstractTask.InternalExecute2(ILogBucket i_LogBucket, TaskResult currentTaskResult)
15.09.2013 20:41:01 Error The task "xyz.qvw" failed. ErrorCount=1
The issue is absolutely nondeterministic to me. It can happen with any task at any time. When the issue is happening, most likely there are more than two tasks affected. After a while the issue disappears by itself and the reload of the document is successful.
My guess would be that some memory limit or any other limit is reached and QlikView is throwing this general error. Does anyone have an idea, in which direction I can investigate or which point in the configuration I could tune? In the server-log I cannot find anything.