No keyword with name 'NOTHING' found.

Prerequisites I want disable of taking Screenshot when something failed!

Steps to reproduce the issue

1. Clone the WebDemo or use your failed test cases
2. Look at http://robotframework.org/SeleniumLibrary/SeleniumLibrary.html#Register Keyword To Run On Failure about NOTHING keyword
3. Disable Run-on-failure functionality by changing resource.robot, add the KEYWORD:

...
*** Keywords ***
Register Keyword To Run On Failure
    NOTHING
...

1. Try run test case with:

...
*** Test Cases ***
Valid Login
    [Setup] Register Keyword To Run On Failure
...

CLI Error message:

No keyword with the name 'NOTHING' found.

Expected behavior: When test case fails, no screenshot was taken.

Actual behavior: Test failed with:

[17:22:08] storenth@storenth-MacBookAir:~/Documents/robot_demo/WebDemo$ pip3 list | grep robot
robotframework (3.1.1)
robotframework-seleniumlibrary (3.3.1)
[17:22:52] storenth@storenth-MacBookAir:~/Documents/robot_demo/WebDemo$ robot login_tests/gherkin_login.robot 
==============================================================================
Gherkin Login :: A test suite with a single Gherkin style test.               
==============================================================================
Valid Login                                                           | FAIL |
Setup failed:
**No keyword with name 'NOTHING' found.**
------------------------------------------------------------------------------
Gherkin Login :: A test suite with a single Gherkin style test.       | FAIL |
1 critical test, 0 passed, 1 failed
1 test total, 0 passed, 1 failed
==============================================================================
Output:  /home/storenth/Documents/robot_demo/WebDemo/output.xml
Log:     /home/storenth/Documents/robot_demo/WebDemo/log.html
Report:  /home/storenth/Documents/robot_demo/WebDemo/report.html

Environment: robotframework (3.1.1) robotframework-seleniumlibrary (3.3.1) https://github.com/robotframework/WebDemo#running-demo

[ombre42]

*** Keywords ***
Register Keyword To Run On Failure
    NOTHING

Couple of things wrong here. First this is creating a keyword that masks the SeleniumLibrary keyword. You should choose a different name. The other is that you are putting the argument on its own line. Robot thinks you are trying to call a keyword named NOTHING.

Your setup keyword should look more like:

*** Keywords ***
Setup On Failure
    Register Keyword To Run On Failure    NOTHING

[storenth]

*** Keywords ***
Register Keyword To Run On Failure
    NOTHING

Couple of things wrong here. First this is creating a keyword that masks the SeleniumLibrary keyword. You should choose a different name. The other is that you are putting the argument on its own line. Robot thinks you are trying to call a keyword named NOTHING.

Your setup keyword should look more like:

*** Keywords ***
Setup On Failure
    Register Keyword To Run On Failure    NOTHING

thanks a lot!