Last Modified: Sep 01, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
21.1.0, 21.1.0.1
Opened: Aug 04, 2026 Severity: 3-Major
Installing a hotfix via the BIG-IP GUI (TMUI) fails with a version-incompatibility error when installing an Engineering Hotfix (EHF) to an inactive or new boot location: Hotfix test failed due to version incompatibility Running tmsh install sys software hotfix dry-run non-persist-db Hotfix-...-ENG.iso fails with a similar error: # tmsh install sys software hotfix dry-run non-persist-db Hotfix-BIGIP-21.1.0.1.0.30.26-ENG.iso progress: analyzing install info: Active volume details: Product=BIG-IP, Version=21.1.0, Build=0.0.38 error: The hotfix is intended for version 21.1.0.1, not 21.1.0 Data Input Error: get-dry-run helper exited with status 1: {"/shared/images/Hotfix-BIGIP-21.1.0.1.0.30.26-ENG.iso":{"success":false,"error":"Hotfix test failed due to version incompatibility"}}
TMUI blocks a valid EHF installation. This prevents GUI-based version-to-version EHF installation to an alternate boot location. Traffic processing is not affected. The problem affects the software-installation workflow.
- The active/booted BIG-IP volume runs a different version than the EHF target version. - The administrator installs the EHF to another boot location through TMUI.
Use tmsh to install the hotfix.
None