PC-HELP.CZ

Prosím vysvětlení uvedené chybové hlášky. Ne jen domněnky. Děkuji:

Nullable object must have a value. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at Labyrint.Library.Framework.LogLib.LoadInternal(String fileTemplate, Boolean checkDayBack, Int32 maxDayBack)
at Labyrint.Library.Framework.LogLib.Load(Boolean checkDayBack, Int32 maxDayBack)
at Labyrint.Player.Framework.PlaysLib.Init()
at Labyrint.Player.Forms.FormMain..ctor()
at Labyrint.Player.Program.Main(String[] args)mscorlib