Why do I get a NullPointerException when I try to create a worklog.

[Maja Stach]

I'm writing a plugin that uses an excel file to create a worklog.

however right now I don't even get my plugin to write any data, even if I add static input parameters.

this is hoe I try to create the worklog:

public void writeWorklog(ExcelRowTo ex) throws ParseException{
		Issue issue = manager.getIssueObject(ex.getClarityTaskId());	
		WorklogInputParameters params = WorklogInputParametersImpl.timeSpent(ex.getSpentHours().toString()).startDate(stringToDate(ex.getOccurredDate())).issue(issue).build();
		WorklogResult result = ws.validateCreate(jsc, params);
		ws.createAndRetainRemainingEstimate(jsc, result, true);

	}

and for some Reason I get a NullPointer.
I would expect a validation-whatever-error or something like that and really can't explain the nullpointer.

Any ideas?
help greatly appreciated.

Good day =)

[Carsten A.]

Could you at least provide at which location/position in the provided code the NullPointer is thrown?