# Common Question?

**URL:** <https://community.zeek.org/t/common-question/128>\
**Category:** Zeek\
**Created:** [February 22, 2001, 4:31am UTC](https://community.zeek.org/t/common-question/128 "2001-02-22T04:31:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Phil\_C](https://avatars.discourse-cdn.com/v4/letter/p/a5b964/32.png) [@Phil\_C](https://community.zeek.org/u/Phil_C)\
**Post date:** [February 22, 2001, 4:31am UTC](https://community.zeek.org/t/common-question/128/1 "2001-02-22T04:31:08Z")

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I am using bro version 0.7a48, which ofcourse came with the usual slew of  
scripts in /usr/local/share/bro. Bro always complains about the file conn.bro  
line 197, which is trying to:

if ( have\_FTP && is\_ftp\_data\_conn(c) )

That looks ok to me (have\_FTP is set to T), the error is:

982815367.072217 ./conn.bro, line 198 (is\_ftp\_data\_conn): run-time error, value used but not set

If I am suffering from this problem, I assume it is by now a common question  
on this list. If so and there are archives or places for 'newbies' to go  
please point me there...

One more quick question, what does &redef do? I see it smattered all over but  
never mentioned in the docs.

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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/common-question/128/2 "2022-05-06T15:36:15Z")

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