>Ok Based on the above I Tried to make Changes in my Code. But seems to be not Okay ? I also didn't got how I will log the Error. Can you please extend your help based on my Code as mentioned below.
>
>

>nRECCOUNTCONVERT=ALLTRIM(STR(RECCOUNT()))
>cRECCOUNTCONVERT=' of '+ALLTRIM(STR(RECCOUNT()))
>Local loMyObject
>loMyObject = CreateObject("MyObject")
>loMyObject.Mainprocess()
>Return
>
>DEFINE CLASS MyObject AS Custom
>PROCEDURE Mainprocess
Local Parallel as Parallel
>local llReTry
llReTry = .f.

>Parallel = NewObject("Parallel", "ParallelFox.vcx")
>Parallel.SetWorkerCount(Parallel.CPUCount)
>Parallel.StartWorkers()
>
>SCAN
>oFilename=ALLTRIM(Fullpath)
>iFilename=ALLTRIM(Newpath)
>RCNON=Recno()
>Try
>Parallel.CallMethod("Pdf2Ps", This.Class, This.ClassLibrary,,,oFilename,iFilename,RCNON)
>catch to loError
>   if loError.ErrorNo = 2027
>       llReTry = .t.
>   else
> *     log the error
>   endif
>ENDTRY
>if m.llReTry
>   try
>Parallel.CallMethod("Pdf2Ps", This.Class, This.ClassLibrary,,,oFilename,iFilename,RCNON)
>   catch to loError
> *     log the error

>ENDTRY
>ENDSCAN
>ENDPROC
>
>PROCEDURE PDF2PS
>PARAMETERS oFilename,iFilename,RCNON
>Declare INTEGER VeryPDF_PDF2Vector in pdf2vec.dll String strCommandLine
>Strcmd= 'pdf2vec -$ XXXXXXXXXXXXXXXX '+CHR(34)+iFilename+CHR(34)+" "+CHR(34)+oFilename+CHR(34)
>nRet = VeryPDF_PDF2Vector(strcmd)
>Sys(2335, 1)	&& disable unattended mode, allow UI
>WAIT WINDOW 'Converting to PS..'+ALLTRIM(STR(RCNON)) NOWAIT
>RETURN
>ENDPROC
>ENDDEFINE
>
>

I made some changes in your code.

Logging the error is normally done with writing to a log file with strtofile. We have a special WriteToLog method which uses strtofile to write to the log file. You will need to implement your own logging of the error.