Dears
i found this error in the SourceCode.Workflow.Management.dll , version 4.9213.450.0 , file size 487kb.
when applying this code
//
ErrorLogCriteriaFilter errCriteria = new ErrorLogCriteriaFilter();
errCriteria.AddRegularFilter(ErrorLogFields.ProcInstID, Comparison.Like, procInstID);
//errCriteria.FilterCollection[0].ColumnName = "[_ErrorLog].[ProcInstID]";
//
and checking the errCriteria.FilterCollection[0].ColumnName, you will notice that the value retrieved is  " _ErrorLog].]ProcID]" not " _ErrorLog].]ProcInstID]".
this results in retriving a wrong result set.
ther is no error in the SourceCode.Workflow.Management.dll , version 4.10060.1.0 , file size 495kb.