Bug ID 540775: URLDecoder: Illegal hex characters in escape (%) pattern..

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3,,,,, 11.6.4, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4

Fixed In:

Opened: Aug 19, 2015
Severity: 3-Major
Related AskF5 Article:


APM Session Variable Report fails with error 'URLDecoder: Illegal hex characters in escape (%) pattern..' when session is active.


Session Variable Report reports an error; unable to view the report.


This issue occurs when session is active and session variable value contains character '%'.


To see session variable details, use one of the following workarounds: -- Run the following command: sessiondump. -- Go to Manage Sessions.

Fix Information

The session variable report shows correctly when session variable value contains character '%'.

Behavior Change