MDSgui : plotting2D: no visible global function definition for
  'coefficients'
MDSgui : plotting2D: no visible global function definition for 'lm'
MDSgui : plotting2D: no visible global function definition for
  'rainbow'
MDSgui : biplot.check.Z: no visible binding for global variable 'var'
MDSgui : plotShepard: no visible global function definition for
  'as.dist'
MDSgui : plotShepard: no visible global function definition for
  'rainbow'
MDSgui : ProcrustesMDSGUIplot: no visible global function definition
  for 'lm'
MDSgui : LoadDataSettxt: no visible global function definition for
  'read.table'
MDSgui : LoadDataSetcsv: no visible global function definition for
  'read.csv'
MDSgui : LoadDistSet: no visible global function definition for
  'read.table'
MDSgui : LoadSimSet: no visible global function definition for
  'read.table'
MDSgui : LoadCorMat: no visible global function definition for
  'read.table'
MDSgui : SaveDataSet: no visible global function definition for
  'write.table'
MDSgui : SaveDistmat: no visible global function definition for
  'write.table'
MDSgui : SaveSimmat: no visible global function definition for
  'write.table'
MDSgui : SaveCormat: no visible global function definition for
  'write.table'
MDSgui : SaveMDScoords: no visible global function definition for
  'write.table'
MDSgui : CityBlock.dist: no visible global function definition for
  'dist'
MDSgui : Minkowski.dist: no visible global function definition for
  'dist'
MDSgui : Canberra.dist: no visible global function definition for
  'dist'
MDSgui : Corr.dist2: no visible global function definition for 'cor'
MDSgui : ClasScal: no visible global function definition for 'cmdscale'
MDSgui : datsetup.smacof: no visible global function definition for
  'cmdscale'
MDSgui : MyMetricSmacofSym: no visible global function definition for
  'cmdscale'
MDSgui : MyMetricSmacofSym: no visible global function definition for
  'runif'
MDSgui : UpDownBlocks.algorithm: no visible binding for global variable
  'weighted.mean'
MDSgui : Euclid.afstand: no visible global function definition for
  'dist'
MDSgui : MyNonMetricSmacofSym: no visible global function definition
  for 'cmdscale'
MDSgui : MyNonMetricSmacofSym: no visible global function definition
  for 'runif'
MDSgui : MyKruskalsMDS: no visible global function definition for
  'cmdscale'
MDSgui : MyKruskalsMDS: no visible global function definition for
  'runif'
MDSgui : SammonMapping: no visible global function definition for
  'cmdscale'
MDSgui : SammonMapping: no visible global function definition for
  'runif'
MDSgui : MetLSC: no visible global function definition for 'cmdscale'
MDSgui : MetLSC : stress.func: no visible global function definition
  for 'dist'
MDSgui : MetLSC: no visible global function definition for 'optim'
MDSgui : MetricLeastSquaresScaling: no visible global function
  definition for 'cmdscale'
MDSgui : MetricLeastSquaresScaling: no visible global function
  definition for 'runif'
MDSgui : plotting2DZoom: no visible global function definition for 'lm'
MDSgui : seczoomplot: no visible global function definition for 'lm'
MDSgui : StressCalculation: no visible global function definition for
  'as.dist'
MDSgui : new.dissim.meas: no visible global function definition for
  'dist'
MDSgui : new.dissim.meas : On.WEUpload: no visible global function
  definition for 'read.table'
MDSgui : new.dissim.meas : OnOK.Mah: no visible global function
  definition for 'cov'
MDSgui : new.dissim.meas : OnOK.Mah: no visible global function
  definition for 'read.table'
MDSgui : FuncCode.Display : DispCode: no visible global function
  definition for 'capture.output'
MDSgui : FuncCode.Display : DispCodeTab: no visible global function
  definition for 'capture.output'
MDSgui : exportsweave: no visible global function definition for
  'Sweave'
MDSgui : MDSGUI.print: no visible global function definition for
  'win.print'
MDSgui : MDSGUI.print: no visible global function definition for
  'dev.off'
MDSgui : versioncheck: no visible global function definition for
  'installed.packages'
Undefined global functions or variables:
  Sweave as.dist capture.output cmdscale coefficients cor cov dev.off
  dist installed.packages lm optim rainbow read.csv read.table runif
  var weighted.mean win.print write.table
Consider adding
  importFrom("grDevices", "dev.off", "rainbow", "win.print")
  importFrom("stats", "as.dist", "cmdscale", "coefficients", "cor",
             "cov", "dist", "lm", "optim", "runif", "var",
             "weighted.mean")
  importFrom("utils", "Sweave", "capture.output", "installed.packages",
             "read.csv", "read.table", "write.table")
to your NAMESPACE file.