Bug ID 1796609: [APM][VDI]TCL error when upgrading to 17.x: can't read "tmm_apm_feed_login": no such variable

Last Modified: Mar 05, 2025

Affected Product(s):
BIG-IP APM, Install/Upgrade(all modules)

Known Affected Versions:
17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1

Opened: Jan 29, 2025

Severity: 3-Major

Symptoms

After upgrading from BIG-IP version 15 to version 17 you may get a RST due to the below TCL error when requesting some application URLs: TCL error: /Common/_sys_APM_VDI_Helper <HTTP_RESPONSE_RELEASE> - can't read "tmm_apm_feed_login": no such variable while executing "if { ($tmm_apm_client_type == "rdg-http" || $tmm_apm_feed_login) && $tmm_apm_is_nego_auth } { # Getting response header fo..."

Impact

TCL errors observed in the LTM logs leading to connection reset

Conditions

-- VDI profile is attached -- iRules are attached with custom priorities

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips