[R-gui] debugging GUI-creation code (Rcmdr)

[Liviu Andronic]

Dear all
How could I properly debug Rcmdr GUI-creation code? I am working on my
plug-in and I get a strange error in an unexpected place. When I try
to debug it via browser()---just before the offending line---and then
'n' to enter the step-through debugger, I always get stopped at the
first doItAndPrint().
Browse[1]> search
[1] "asdf"
Browse[1]> searchCommand
[1] "findFn('asdf')"
Browse[1]> n
debug at /home/liviu/Devel/Rcmdr-dev/Rcmdr.sos/RcmdrPlugin.sos-0.1-0/R/sosInit.R#51:
doItAndPrint(paste("## Launching RSiteSearch, please be patient.."))
Browse[2]> n
Error in function ()  : invalid connection
Error: invalid connection

However I know that the error doesn't occur there, since when I use
the same "asdf" string in the non-debug section, the function outputs
as expected. (It is for more complex strings such as "asdf ; HTMLgrid"
that the function unexpectedly terminates with the above error, in
non-debug sessions).

How should I correctly debug Rcmdr GUI-creation code? Thank you
Liviu


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