sqldf not working after update

Question

When I run the first example from sqldf function documentation:

library(sqldf)
a1s <- sqldf("select * from warpbreaks limit 6")

I get an error:

Error in if (.allows_extensions(db)) { :missing value where TRUE/FALSE needed    

This error appeared today after updating some packages to their latest versions. Any suggestions how to fix this or how to revert to previous versions?

Answer 1

Adding the following code to the beginning of my script solved the issue

library(checkpoint)
checkpoint("2014-10-08") # the date when the script worked fine