The given key was not present in the dictionary.

[Chandra Upadhya]

The result of examine model output of qswat3 1.6.5 is as given below:

"
********** Starting Analysis *************
Reading output.std...
Finished reading output.std in 00h:00m:00.65s. Reading output.rch...The given key was not present in the dictionary.

If you cannot resolve the error, please contact technical support with the message listed below.
----------------------------------------------------------------------
Type: System.Collections.Generic.KeyNotFoundException
Message: The given key was not present in the dictionary.
Source: mscorlib
Location: System.Collections.Generic.Dictionary`2, line 0, column 0
StackTrace:
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at SWAT.OutputProcessor.Parsers.OutputRchParser.ReadFile()
   at SWAT.Check.Desktop.SWATCheck.backgroundWorker_DoWork(Object sender, DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
"

Version of QGIS is: QGIS 3.18.3
explain the reason.  Please provide effective method to eliminate it.