# malformed regular expression **URL:** \ **Category:** Zeek\ **Created:** [May 2, 2001, 8:31am UTC](https://community.zeek.org/t/malformed-regular-expression/153 "2001-05-02T08:31:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Vern](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.zeek.org/vern/32/630_2.png) [@Vern](https://community.zeek.org/u/Vern)\ **Post date:** [May 2, 2001, 8:31am UTC](https://community.zeek.org/t/malformed-regular-expression/153/1 "2001-05-02T08:31:00Z")
[I've put bro@lbl.gov back onto the cc line, since others may find this dialog helpful] > I run it on FreeBSD4.2. > The run-time error appears some times, but not allways... > When I monitor an ethernet network, it may appear 10 times a day. > but yesterday I tried it on a gigabit link... and the error appears a lot > more. > > It seems to occur with some packet arrival. > > $ bro -i wx0 mt.bro The next thing to do is use -w tracefile to record the traffic that Bro is reading, and then see if you can reproduce the problem using -r tracefile. If so, send the trace to me and I'll track it down, and fix the error message.     Vern ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/zeek/original/1X/f09d732bc2cc7c7cc7e35db67cf4e1d5233ce7a7.png) [@system](https://community.zeek.org/u/system)\ **Post date:** [May 6, 2022, 3:36pm UTC](https://community.zeek.org/t/malformed-regular-expression/153/2 "2022-05-06T15:36:19Z")