Technical Tip: Debug Flow Utility on GUI does not display output after a firmware upgrade to FortiOS v7.4.6, v7.6.1 or v7.6.2

[mkhabbazi]

Description	This article describes an issue where GUI debug flow does not display any output after upgrading to FortiOS v7.4.6, v7.6.1 or v7.6.2.
Scope	FortiGate v7.4.6, v7.6.1, v7.6.2.
Solution	In v7.4.6, v7.6.1, and v7.6.2, the first debug flow capture works as expected, but subsequent captures do not generate any output. For instance, if the FortiGate is rebooted, the debug flow will display output immediately after the reboot.        However, if the debug flow is run for the second time, no output will be shown.   This issue has been resolved in FortiOS versions. v7.4.8 (scheduled to be released in April 2025). v7.6.3 (scheduled to be released in March 2025). Note that these timelines for firmware release are estimates and may be subject to change. Workaround: Use CLI debug flow commands. diagnose debug flow filter addr <IP> diagnose debug flow show function-name enable diagnose debug flow show iprope enable diagnose debug flow trace start 99999999 diagnose debug enable <reproduce the issue> diagnose debug disable Related documents: Technical Tip : Using GUI debug flow tool... - Fortinet Community Debugging the packet-flow