R integration crashing

[#1]

Hello, 

I've been running R integration specifically for making graphics with ggplot. Today of a sudden I started getting this error: 

The request could not be completed because the R child process terminated unexpectedly with exit status 0xc0000409.
Send data for "dt" failed

I can still send data to R with other add ins that I've created, but something is happening specifically only with ggplot graphics. 

[#2]

Might be worth examining the 'dt' table to see if it looks reasonable. (I'm guessing. Never used R.)

[#3]

It looks like that exit code is normally from a stack overflow. I concur with @Craige_Hales that examining dt is a good place to start.  You might follow that by sending a smaller version of dt to R, and by running each line of the R script separately, or gradually add lines to your script, until you find the exact line that causes the error.