[BioC] object masked error

[D.Enrique ESCOBAR ESPINOZA]

can someone explain to me the following error:
Loading required package: affyQCReport
Loading required package: reposTools

Attaching package: 'reposTools'


        The following object(s) are masked from package:Biobase :

         userQuery

Loading required package: simpleaffy
Welcome to 'affyQCReport' V 1.6-1
Further information available at: www.bifix.org
      mailto: craig.parman at bifix.org
THANKS