# malformed regular expression

**URL:** <https://community.zeek.org/t/malformed-regular-expression/138>\
**Category:** Zeek\
**Created:** [March 8, 2001, 5:20pm UTC](https://community.zeek.org/t/malformed-regular-expression/138 "2001-03-08T17:20:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**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:** [March 8, 2001, 5:20pm UTC](https://community.zeek.org/t/malformed-regular-expression/138/1 "2001-03-08T17:20:55Z")

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> I'm getting this run-time error:
> 
> \<some time\> rune-time error: attempt to match to a malformed regular  
> expression.
> 
> The problem is that I don't know where it occurs. (in which event, ...)  
> Do I get this message when trying to write to a file a empty string returned  
> by Bro?  
> Is there a way to get more precise error message? To be able to correct my  
> script.

As usual, when reporting a problem like this, please include your script(s)  
so it can be reproduced.

&nbsp;&nbsp;&nbsp;&nbsp;Vern

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**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/138/2 "2022-05-06T15:36:17Z")

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