Add error item; extend documentation wire missing class wirde is conditional disable structure.

Actors/CSPP_BaseActor/CSPP_BaseActor.lvlib

@@ -12,7 +12,9 @@
 	<Property Name="NI.Lib.Description" Type="Str">This library contains the CS++ base class for actors.
 
 Conditional Disable Symbols:
-WebpubLaunchBrowser={Default: Do not launch a browser, IE: Launch MS Internet Explorer}
+- WebpubLaunchBrowser={Default: Do not launch a browser, IE: Launch MS Internet Explorer}
+- CSPP_PQMonitor={Default: False,True}
+
 
 Author: H.Brand@gsi.de, D.Neidherr@gsi.de
 

CSPP_Core-errors.txt

@@ -82,4 +82,7 @@ PV data type not supported.
 <nierror code="-8977">
 Settings file not compatible with current actor object.
 </nierror>
+<nierror code="-8976">
+Priority message queue pile-up monitoring not enabled.
+</nierror>
 </nidocument>
\ No newline at end of file