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Workaround for “Nmap 7.8 Assertion failed: htn.toclock_running == true” · Issue #1764 · nmap/nmap · GitHub

Posted by jpluimers on 2020/03/27

I got this on Windows 10, 8.1 and 7, MacOS and Linux:

C:\bin>nmap -sn
Starting Nmap 7.80 ( ) at 2020-03-24 13:44 W. Europe Standard Time
Assertion failed: htn.toclock_running == true, file ..\, line 503

Luckily [WayBack] Nmap 7.8 Assertion failed: htn.toclock_running == true · Issue #1764 · nmap/nmap · GitHub has a solution: add the --max-parallelism 100 parameter:

C:\bin>nmap -sn --max-parallelism 100
Starting Nmap 7.80 ( ) at 2020-03-24 13:48 W. Europe Standard Time
Nmap scan report for
Host is up.
Nmap done: 256 IP addresses (50 hosts up) scanned in 54.07 seconds

The other workaround is to have at least one ARP request succeed.

Via [WayBack] “Assertion failed: htn.toclock_running == true, file ..\, line 503” – Google Search


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