Asciidoc: no visible binding for global variable ‘RweaveAsciidoc’
Org: no visible binding for global variable ‘RweaveOrg’
Pandoc: no visible binding for global variable ‘RweavePandoc’
ReST: no visible binding for global variable ‘RweaveReST’
Report: no visible global function definition for ‘new’
T2t: no visible binding for global variable ‘RweaveT2t’
Textile: no visible binding for global variable ‘RweaveTextile’
ascii.coxph: no visible global function definition for ‘pchisq’
ascii.mtable: no visible global function definition for ‘ftable’
ascii.summary.survfit: no visible global function definition for
  ‘naprint’
ascii.survdiff: no visible global function definition for ‘pchisq’
ascii.survfit: no visible global function definition for ‘naprint’
ascii.ts: no visible global function definition for ‘time’
ascii.ts: no visible global function definition for ‘cycle’
ascii.ts: no visible global function definition for ‘frequency’
ascii.ts: no visible global function definition for ‘start’
ascii.ts: no visible global function definition for ‘end’
ascii.zoo: no visible global function definition for ‘as.ts’
asciiCbind: no visible global function definition for ‘new’
asciiList: no visible global function definition for ‘new’
asciiMixed: no visible global function definition for ‘new’
asciiTable: no visible global function definition for ‘new’
fig: no visible global function definition for ‘jpeg’
fig: no visible global function definition for ‘png’
fig: no visible global function definition for ‘pdf’
fig: no visible global function definition for ‘dev.off’
graph: no visible global function definition for ‘jpeg’
graph: no visible global function definition for ‘png’
graph: no visible global function definition for ‘pdf’
graph: no visible global function definition for ‘dev.off’
weaverAsciiFinish: no visible global function definition for
  ‘resetStorage’
weaverAsciiFinish: no visible binding for global variable ‘cache_expr’
weaverAsciiRuncode: Error while checking: object ‘weaverEvalWithOpt’
  not found
weaverAsciiSetup: no visible global function definition for ‘log_debug’
weaverOrgSetup: no visible global function definition for ‘log_debug’
weaverPandocSetup: no visible global function definition for
  ‘log_debug’
weaverReSTSetup: no visible global function definition for ‘log_debug’
weaverT2tSetup: no visible global function definition for ‘log_debug’
weaverTextileSetup: no visible global function definition for
  ‘log_debug’
Undefined global functions or variables:
  RweaveAsciidoc RweaveOrg RweavePandoc RweaveReST RweaveT2t
  RweaveTextile as.ts cache_expr cycle dev.off end frequency ftable
  jpeg log_debug naprint new pchisq pdf png resetStorage start time
Consider adding
  importFrom("grDevices", "dev.off", "jpeg", "pdf", "png")
  importFrom("methods", "new")
  importFrom("stats", "as.ts", "cycle", "end", "frequency", "ftable",
             "naprint", "pchisq", "start", "time")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').