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If the first message in an mbox is deleted by an external program, therefore removing the X-IMAPbase header, an error such as the following occurs. Apr 9 20:10:51 sm1 dovecot: imap(306812): file mbox-sync-update.c: line 460 (mbox_sync_update_header_from): assertion failed: (ctx->mail.uid == 0 || ctx->mail.uid_broken || ctx->mail.uid == mail->uid) This prevents the user from logging in, but also appears to cause mbox corruption. If the X-IMAPbase and the X-UID headers a...

my problem can be explained with the following example: x <- 1:12 y <- 13:24 a <- data.frame(x = x, y = y) ## if i write a$x ## it returns [1] 1 2 3 4 5 6 7 8 9 10 11 12 ## but the function get doesn't recognize a$x. Instead it produces the following error: get("a$x") Error in get(x, envir, mode, inherits) : variable "a$x" was not found i intend to do