What is the reason for Error Undefined keyword when using keywords in robotframework?

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The reason for Error Undefined keyword when using keywords in robotframework could be:

1. The keyword name is misspelled or not defined in the test suite.
2. The library where the keyword is defined is not imported or wrongly imported.
3. The syntax of the keyword call is incorrect, for example, missing arguments or incorrect number of arguments.
4. The keyword is defined with a different name than the one called in the test case.
5. The scope of the keyword is not global, and it is not defined in the current test case or suite.
6. The keyword is defined in a different resource file that is not accessed or imported in the current test case or suite.
7. The keyword is defined with a different prefix than the one used in the test case or suite. For example, using camelCase instead of snake_case.