Skip to content
Prev 393036 / 398498 Next
Original Raw

When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ?

Ivan Krylov 
? Mon, 24 Oct 2022 12:07:44 -0400
Kelly Thompson <kt1572757 at gmail.com> ?????:
This seems to be a bug in require(). In addition to understanding
character strings as arguments, require() can load packages named by
unquoted barewords:

require(base)

This uses non-standard evaluation, and the part that transforms an
unquoted symbol into a package name doesn't expect to see what is
effectively `[`(packages_i_want_to_use, 1) instead of a single symbol.

If you pass the character.only = TRUE argument to require(), this
additional handling is disabled, making your examples work again. It's
a good idea to always pass this argument when calling require() with a
variable as the first argument.

Thread (9 messages)

Kelly Thompson When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Andrew Simmons When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Ivan Krylov When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Henrik Bengtsson When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Bert Gunter When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Jeff Newmiller When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Kelly Thompson When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Andrew Simmons When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24 Kelly Thompson When using require(), why do I get the error message "Error in if (!loaded) { : the condition has length > 1" ? Oct 24