What are the differences between a 'runtime error' and a 'compile-time error' when encountering 'error occurred'?

A 'runtime error' occurs during the program's execution, often signaled by an 'error occurred' message. A 'compile-time error' occurs during the compilation process (before the program runs) due to syntax or type errors in the code. Compile-time errors are prevented from running, while runtime errors require error handling.