Found the following significant warnings:
  Rd warning: Previous alias or file overwritten by alias: chol,dsCMatrix-method
  Rd warning: Previous alias or file overwritten by alias: chol,lsCMatrix-method
  Rd warning: Previous alias or file overwritten by alias: chol,nsCMatrix-method
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ddiMatrix,ddenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ddiMatrix,ldenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ddiMatrix,ndenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ldiMatrix,ddenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ldiMatrix,ldenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ldiMatrix,ndenseMatrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ddiMatrix,Matrix-method.html’: No such file or directory
  Rd warning: cannot open file ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/build/Packages/00LOCK-Matrix/00new/Matrix/help/%/%,ldiMatrix,Matrix-method.html’: No such file or directory
  Rd warning: Previous alias or file overwritten by alias: expand
  Rd warning: Previous alias or file overwritten by alias: crossprod-methods
  Rd warning: Previous alias or file overwritten by alias: tcrossprod-methods
See ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/Matrix.Rcheck/00install.out’ for details.