1 files changed, 7 insertions, 0 deletions
diff --git a/bp.1.md b/bp.1.md
index 94b1af0..74fa454 100644
--- a/bp.1.md
+++ b/bp.1.md
@@ -241,6 +241,13 @@ contain the word **"IGNORE"**)
 *name***:** *pat*
 : Define *name* to mean *pat* (pattern definition)
 
+**(!)** *error-pat*
+: If *error-pat* matches, **bp** will not print any results in this file and
+instead print an error message highlighting the matching position of
+*error-pat* in the file and printing the text of *error-pat* as an error
+message. Then, **bp** will exit with a failure status and not process any
+further files.
+
 **\#** *comment*
 : A line comment